Poppler should support TTC files.  Albert:

Patch i got for kpdf from Takashi Iwai <tiwai AT suse DOT de> adapted to 
poppler

TTC is TrueType font Collection, that is more than a TTF in the same file, 
this adds support to specifying them in the /etc/xpdfrc file adding a number 
at the end of the displayFontTT line, the cool thing is that it can be easily 
adapted to the fontconfig patch i sent changing 

if (!strncasecmp(ext,".ttf",4)) {
	  dfp = new DisplayFontParam(fontName->copy(), displayFontTT);  
   	  dfp->tt.fileName = new GooString((char*)s);
}

to 

if (!strncasecmp(ext,".ttf",4) || !strncasecmp(ext,".ttc",4)) {
	  dfp = new DisplayFontParam(fontName->copy(), displayFontTT);  
   	  dfp->tt.fileName = new GString((char*)s);
   	  FcPatternGetInteger(m, FC_INDEX, 0, &(dfp->tt.faceIndex));
}

Some CJK fonts come in ttc format