Attach (recommended) or Link to PDF file here:
https://web.archive.org/web/20091223123331/http://sci2s.ugr.es/keel/pdf/specific/articulo/alp99.pdf
(aka `tests/pdfs/issue1936.pdf`)
 
When I copy/paste the multiplication sign on the first line of the first page, I got a `£`.
And when I do the same in evince I got a `×` (the same in chrome).
The font descriptor is:
```
<< /Ascent 0 /CapHeight 749 /CharSet (/multiply) /Descent 0 /Flags 262212 /FontBBox [ -27 -940 1332 825 ] /FontFile3 59 0 R /FontName /KHPEPJ+CMBSY10 /ItalicAngle -14.035 /StemV 0 /Type /FontDescriptor >>
```
So it should be possible to guess the correct character in using the `CharSet` entry:
https://www.adobe.com/content/dam/acom/en/devnet/pdf/pdfs/PDF32000_2008.pdf#page=291


if (privateUseAreaIndex >= PRIVATE_USE_AREAS.length) {
          warn("Ran out of space in font private use area.");
          break;
        }
        nextAvailableFontCharCode = PRIVATE_USE_AREAS[privateUseAreaIndex][0];
        privateUseOffetEnd = PRIVATE_USE_AREAS[privateUseAreaIndex][1];
      }
      var fontCharCode = nextAvailableFontCharCode++;
      if (glyphId === 0) {
        glyphId = newGlyphZeroId;
      }
      newMap[fontCharCode] = glyphId;
      toFontChar[originalCharCode] = fontCharCode;
    }
    return {
      toFontChar,
      charCodeToGlyphId: newMap,
      nextAvailableFontCharCode,
    };
  }
  function getRanges(glyphs, numGlyphs) {
    
    
    var codes = [];
    for (var charCode in glyphs) {
      
      if (glyphs[charCode] >= numGlyphs) {
        continue;
      }
      codes.push({ fontCharCode: charCode | 0, glyphId: glyphs[charCode] });