this report has been filed here:

https://bugs.edge.launchpad.net/ubuntu/+source/poppler/+bug/657587

"evince crashes with segfault when opening the attached PDF. The problem itself is a null deref not it's not a critical one."

pdf :

https://bugs.edge.launchpad.net/ubuntu/+source/poppler/+bug/657587/+attachment/1681202/+files/a.pdf.gz

backtrace:

"#0  CairoType3Font::create (gfxFont=0x21dc6d00, xref=0x2196ad90, 
    catalog=0x219ba8e0, fontEngine=0x21961c88, printing=0)
    at CairoFontEngine.cc:697
    font_face = (cairo_font_face_t *) 0x21b4ce48
    ref = {num = 93, gen = 0}
    i = 32
    charProcs = (Dict *) 0x0
    j = 565637176
    name = 0x7fd0b5b "space"
#1  0x06e629ab in CairoFontEngine::getFont (this=0x21961c88, 
    gfxFont=0x21dc6d00, xref=0x2196ad90, catalog=0x219ba8e0, printing=0)
    at CairoFontEngine.cc:781
    i = <value optimized out>
    j = <value optimized out>
    ref = {num = 93, gen = 0}
    font = (CairoFont *) 0x0
#2  0x06e68133 in CairoOutputDev::updateFont (this=0x219859b8, 
    state=0x21d1a4e0) at CairoOutputDev.cc:571
    font_face = <value optimized out>
    fontSize = 0
    m = <value optimized out>
    w = 0
    matrix = {xx = 2.8702809867985609e-146, yx = 1.9105964759831671e-313, 
  xy = 0, yy = 4.4955550949817957e-270, x0 = 3.4663850250348031e-270, 
  y0 = 2.5818931774188409e-270}
    invert_matrix = {xx = 0, yx = 0, xy = 0, 
  yy = 2.4957621706319076e-146, x0 = 9.999994290410541e-07, 
  y0 = 2.5333803837618225e-270}
#3  0x07f0ecb2 in Gfx::opShowText (this=0x2198fb58, args=0xb639fc84, 
    numArgs=1) at Gfx.cc:3466
No locals.
#4  0x07f0c716 in Gfx::execOp (this=0x2198fb58, cmd=0xb639fe24, 
    args=0xb639fc84, numArgs=1) at Gfx.cc:840
    op = <value optimized out>
    name = 0x21e6bdd8 "Tj"
    argPtr = (Object *) 0xb639fc84
    i = 1
#5  0x07f0d2dc in Gfx::go (this=0x2198fb58, topLevel=1) at Gfx.cc:700
    timer = {start_time = {tv_sec = 1286700176, tv_usec = 392115}, 
  end_time = {tv_sec = 133490189, tv_usec = 134414324}, active = 1}
    obj = {type = objCmd, {booln = 568770008, intg = 568770008, 
    uintg = 568770008, real = 0.0018151794862254402, string = 0x21e6bdd8, 
    name = 0x21e6bdd8 "Tj", array = 0x21e6bdd8, dict = 0x21e6bdd8, 
    stream = 0x21e6bdd8, ref = {num = 568770008, gen = 1063107946}, 
    cmd = 0x21e6bdd8 "Tj"}}
    numArgs = 1
    i = <value optimized out>
    lastAbortCheck = 0
    args = {{type = objString, {booln = 565920496, intg = 565920496, 
      uintg = 565920496, real = 0.0018151794856075508, string = 0x21bb42f0, 
      name = 0x21bb42f0 "Where", array = 0x21bb42f0, dict = 0x21bb42f0, 
      stream = 0x21bb42f0, ref = {num = 565920496, gen = 1063107946}, 
      cmd = 0x21bb42f0 "Where"}}, {type = objNone, {booln = 1247945698, 
      intg = 1247945698, uintg = 1247945698, real = 4.7042400000000004, 
      string = 0x4a6223e2, 
      name = 0x4a6223e2 <Address 0x4a6223e2 out of bounds>, 
      array = 0x4a6223e2, dict = 0x4a6223e2, stream = 0x4a6223e2, ref = {
        num = 1247945698, gen = 1074975012}, 
      cmd = 0x4a6223e2 <Address 0x4a6223e2 out of bounds>}}, {type = objNone, 
    {booln = -114074331, intg = -114074331, uintg = 4180892965, 
      real = -4.7142600000000003, string = 0xf9335d25, 
      name = 0xf9335d25 <Address 0xf9335d25 out of bounds>, 
      array = 0xf9335d25, dict = 0xf9335d25, stream = 0xf9335d25, ref = {
        num = -114074331, gen = -1072506010}, 
      cmd = 0xf9335d25 <Address 0xf9335d25 out of bounds>}}, {type = objNone, 
    {booln = 1, intg = 1, uintg = 1, real = -4.7142562866210946, 
      string = 0x1, name = 0x1 <Address 0x1 out of bounds>, array = 0x1, 
      dict = 0x1, stream = 0x1, ref = {num = 1, gen = -1072506010}, 
      cmd = 0x1 <Address 0x1 out of bounds>}}, {type = objNone, {
      booln = 1697371076, intg = 1697371076, uintg = 1697371076, 
      real = 73.407800000000009, string = 0x652bd3c4, 
      name = 0x652bd3c4 <Address 0x652bd3c4 out of bounds>, 
      array = 0x652bd3c4, dict = 0x652bd3c4, stream = 0x652bd3c4, ref = {
        num = 1697371076, gen = 1079138841}, 
      cmd = 0x652bd3c4 <Address 0x652bd3c4 out of bounds>}}, {type = objNone, 
    {booln = -206158430, intg = -206158430, uintg = 4088808866, 
      real = 413.68700000000001, string = 0xf3b645a2, 
      name = 0xf3b645a2 <Address 0xf3b645a2 out of bounds>, 
      array = 0xf3b645a2, dict = 0xf3b645a2, stream = 0xf3b645a2, ref = {
        num = -206158430, gen = 1081727741}, 
      cmd = 0xf3b645a2 <Address 0xf3b645a2 out of bounds>}}, {type = objNone, 
    {booln = 0, intg = 0, uintg = 0, real = 3.8253340343173894e-147, 
      string = 0x0, name = 0x0, array = 0x0, dict = 0x0, stream = 0x0, ref = {
        num = 0, gen = 562590952}, cmd = 0x0}}, {type = objNone, {booln = 0, 
      intg = 0, uintg = 0, real = 0, string = 0x0, name = 0x0, array = 0x0, 
      dict = 0x0, stream = 0x0, ref = {num = 0, gen = 0}, cmd = 0x0}}, {
    type = objNone, {booln = 0, intg = 0, uintg = 0, 
      real = 2.66727758641971e-270, string = 0x0, name = 0x0, array = 0x0, 
      dict = 0x0, stream = 0x0, ref = {num = 0, gen = 133598133}, 
      cmd = 0x0}}, {type = objNone, {booln = 0, intg = 0, uintg = 0, 
      real = 2.6657576127552318e-270, string = 0x0, name = 0x0, array = 0x0, 
      dict = 0x0, stream = 0x0, ref = {num = 0, gen = 133597291}, 
      cmd = 0x0}}, {type = objNone, {booln = 0, intg = 0, uintg = 0, 
      real = 3.8253340343173894e-147, string = 0x0, name = 0x0, array = 0x0, 
      dict = 0x0, stream = 0x0, ref = {num = 0, gen = 562590952}, 
      cmd = 0x0}}, {type = objNone, {booln = 0, intg = 0, uintg = 0, 
      real = 3.8253340343173894e-147, string = 0x0, name = 0x0, array = 0x0, 
      dict = 0x0, stream = 0x0, ref = {num = 0, gen = 562590952}, 
      cmd = 0x0}}, {type = objNone, {booln = 0, intg = 0, uintg = 0, 
      real = 8.4879831638610893e-314, string = 0x0, name = 0x0, array = 0x0, 
      dict = 0x0, stream = 0x0, ref = {num = 0, gen = 4}, cmd = 0x0}}, {
    type = objNone, {booln = 0, intg = 0, uintg = 0, 
      real = 5.0669347139146951e-304, string = 0x0, name = 0x0, array = 0x0, 
      dict = 0x0, stream = 0x0, ref = {num = 0, gen = 16137471}, cmd = 0x0}}, 
  {type = objNone, {booln = 0, intg = 0, uintg = 0, 
      real = 2.4957837235473633e-146, string = 0x0, name = 0x0, array = 0x0, 
      dict = 0x0, stream = 0x0, ref = {num = 0, gen = 565441036}, 
      cmd = 0x0}}, {type = objNone, {booln = 0, intg = 0, uintg = 0, 
      real = 3.8253340343173894e-147, string = 0x0, name = 0x0, array = 0x0, 
      dict = 0x0, stream = 0x0, ref = {num = 0, gen = 562590952}, 
      cmd = 0x0}}, {type = objNone, {booln = 0, intg = 0, uintg = 0, 
      real = 4.4955549827687231e-270, string = 0x0, name = 0x0, array = 0x0, 
      dict = 0x0, stream = 0x0, ref = {num = 0, gen = 134414324}, 
      cmd = 0x0}}, {type = objNone, {booln = 0, intg = 0, uintg = 0, 
      real = -1.7783323522495614e-47, string = 0x0, name = 0x0, array = 0x0, 
      dict = 0x0, stream = 0x0, ref = {num = 0, gen = -1237713528}, 
      cmd = 0x0}}, {type = objNone, {booln = 0, intg = 0, uintg = 0, 
      real = 5.4323092248710971e-312, string = 0x0, name = 0x0, array = 0x0, 
      dict = 0x0, stream = 0x0, ref = {num = 0, gen = 256}, cmd = 0x0}}, {
    type = objNone, {booln = 0, intg = 0, uintg = 0, 
      real = 4.4955549827687231e-270, string = 0x0, name = 0x0, array = 0x0, 
      dict = 0x0, stream = 0x0, ref = {num = 0, gen = 134414324}, 
      cmd = 0x0}}, {type = objNone, {booln = 0, intg = 0, uintg = 0, 
      real = 4.4955549827687231e-270, string = 0x0, name = 0x0, array = 0x0, 
      dict = 0x0, stream = 0x0, ref = {num = 0, gen = 134414324}, 
      cmd = 0x0}}, {type = objNone, {booln = 0, intg = 0, uintg = 0, 
      real = -1.7783657618084376e-47, string = 0x0, name = 0x0, array = 0x0, 
      dict = 0x0, stream = 0x0, ref = {num = 0, gen = -1237713496}, 
      cmd = 0x0}}, {type = objNone, {booln = 0, intg = 0, uintg = 0, 
      real = 2.1219957909652723e-314, string = 0x0, name = 0x0, array = 0x0, 
      dict = 0x0, stream = 0x0, ref = {num = 0, gen = 1}, cmd = 0x0}}, {
    type = objNone, {booln = 0, intg = 0, uintg = 0, 
      real = 4.4955549827687231e-270, string = 0x0, name = 0x0, array = 0x0, 
      dict = 0x0, stream = 0x0, ref = {num = 0, gen = 134414324}, 
      cmd = 0x0}}, {type = objNone, {booln = 0, intg = 0, uintg = 0, 
      real = 2.4736777103857105e-270, string = 0x0, name = 0x0, array = 0x0, 
      dict = 0x0, stream = 0x0, ref = {num = 0, gen = 133490887}, 
      cmd = 0x0}}, {type = objNone, {booln = 0, intg = 0, uintg = 0, 
      real = 1.2731974745791634e-313, string = 0x0, name = 0x0, array = 0x0, 
      dict = 0x0, stream = 0x0, ref = {num = 0, gen = 6}, cmd = 0x0}}, {
    type = objNone, {booln = 0, intg = 0, uintg = 0, 
      real = 1.0032357386390807e-303, string = 0x0, name = 0x0, array = 0x0, 
      dict = 0x0, stream = 0x0, ref = {num = 0, gen = 17171448}, cmd = 0x0}}, 
  {type = objNone, {booln = 0, intg = 0, uintg = 0, real = 0, string = 0x0, 
      name = 0x0, array = 0x0, dict = 0x0, stream = 0x0, ref = {num = 0, 
        gen = 0}, cmd = 0x0}}, {type = objNone, {booln = 0, intg = 0, 
      uintg = 0, real = 0, string = 0x0, name = 0x0, array = 0x0, dict = 0x0, 
      stream = 0x0, ref = {num = 0, gen = 0}, cmd = 0x0}}, {type = objNone, {
      booln = 0, intg = 0, uintg = 0, real = 1.0032301759544344e-303, 
      string = 0x0, name = 0x0, array = 0x0, dict = 0x0, stream = 0x0, ref = {
        num = 0, gen = 17171440}, cmd = 0x0}}, {type = objNone, {booln = 0, 
      intg = 0, uintg = 0, real = 0.0099999979138374329, string = 0x0, 
      name = 0x0, array = 0x0, dict = 0x0, stream = 0x0, ref = {num = 0, 
        gen = 1065646817}, cmd = 0x0}}, {type = objNone, {booln = 0, 
      intg = 0, uintg = 0, real = 3.8253340343173894e-147, string = 0x0, 
      name = 0x0, array = 0x0, dict = 0x0, stream = 0x0, ref = {num = 0, 
        gen = 562590952}, cmd = 0x0}}, {type = objNone, {booln = 0, intg = 0, 
      uintg = 0, real = 2.1219957909652723e-314, string = 0x0, name = 0x0, 
      array = 0x0, dict = 0x0, stream = 0x0, ref = {num = 0, gen = 1}, 
      cmd = 0x0}}}
#6  0x07f0dd29 in Gfx::display (this=0x2198fb58, obj=0xb639ff24, topLevel=1)
    at Gfx.cc:667
    obj2 = {type = objNone, {booln = 0, intg = 0, uintg = 0, 
    real = 1.9821160610602139e-270, string = 0x0, name = 0x0, array = 0x0, 
    dict = 0x0, stream = 0x0, ref = {num = 0, gen = 133218583}, cmd = 0x0}}
    i = <value optimized out>
#7  0x07f5a8a0 in Page::displaySlice (this=0x2192cfd0, out=0x219859b8, 
    hDPI=72, vDPI=72, rotate=0, useMediaBox=0, crop=1, sliceX=-1, sliceY=-1, 
    sliceW=-1, sliceH=-1, printing=0, catalog=0x219ba8e0, abortCheckCbk=0, 
    abortCheckCbkData=0x0, annotDisplayDecideCbk=0, 
    annotDisplayDecideCbkData=0x0) at Page.cc:474
    gfx = (Gfx *) 0x2198fb58
    obj = {type = objStream, {booln = 562590952, intg = 562590952, 
    uintg = 562590952, real = 1.0013647921235704e-305, string = 0x218874e8, 
    name = 0x218874e8 "h�\002\b\003", array = 0x218874e8, dict = 0x218874e8, 
    stream = 0x218874e8, ref = {num = 562590952, gen = 10231958}, 
    cmd = 0x218874e8 "h�\002\b\003"}}
    i = <value optimized out>
#8  0x06e5b101 in _poppler_page_render (page=0x2193ec80, cairo=0xa58460, 
    printing=0) at poppler-page.cc:336
    output_dev = (class CairoOutputDev *) 0x219859b8
    __PRETTY_FUNCTION__ = "void _poppler_page_render(PopplerPage*, cairo_t*, GBool)"
#9  0x06e5b3b8 in _poppler_page_render_to_pixbuf (page=<value optimized out>, 
    src_x=32, src_y=0, src_width=100, src_height=129, 
    scale=0.16339869281045752, rotation=0, printing=0, pixbuf=0x219a7ec0)
    at poppler-page.cc:568
    cr = (cairo_t *) 0xa58460
    surface = (cairo_surface_t *) 0x21cd4ea0
#10 0x0cd1239d in make_thumbnail_for_page (
    poppler_page=<value optimized out>, rc=<value optimized out>, width=100, 
    height=129)
    at /build/buildd/evince-2.32.0/./backend/pdf/ev-poppler.cc:1404
    pixbuf = (GdkPixbuf *) 0x7fd0b5b
#11 0x0cd12483 in pdf_document_thumbnails_get_thumbnail (
    document_thumbnails=0x2156fe68, rc=0x2193ec60, border=1)
    at /build/buildd/evince-2.32.0/./backend/pdf/ev-poppler.cc:1467
    poppler_page = (PopplerPage *) 0x2193ec80
    pixbuf = <value optimized out>
    border_pixbuf = <value optimized out>
    width = 100
    height = 129
#12 0x008e5ff3 in ev_document_thumbnails_get_thumbnail (document=0x2156fe68, 
    rc=0x2193ec60, border=1)
    at /build/buildd/evince-2.32.0/./libdocument/ev-document-thumbnails.c:44
    __PRETTY_FUNCTION__ = "ev_document_thumbnails_get_thumbnail"
#13 0x00124ed5 in ev_job_thumbnail_run (job=0xb4de9e90)
    at /build/buildd/evince-2.32.0/./libview/ev-jobs.c:779
    rc = (EvRenderContext *) 0x2193ec60
    page = <value optimized out>
#14 0x00122371 in ev_job_run (job=0xb4de9e90)
    at /build/buildd/evince-2.32.0/./libview/ev-jobs.c:214
No locals.
#15 0x00126368 in ev_job_thread_proxy (data=0x0)
    at /build/buildd/evince-2.32.0/./libview/ev-job-scheduler.c:183
    job = (EvSchedulerJob *) 0xb4d48470
#16 0x00cd648f in ?? () from /lib/libglib-2.0.so.0
No symbol table info available.
#17 0x00c08cc9 in start_thread () from /lib/libpthread.so.0
No symbol table info available.
#18 0x00fd56ae in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130
No locals."