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 (index === -1) {
          strings.add(glyphName);
        }
        charsetArray.push(glyphName);
      }
      cff.charset = new CFFCharset(false, 0, charsetArray);
      var charStringsIndex = new CFFIndex();
      charStringsIndex.add([0x8b, 0x0e]); 
      for (i = 0; i < count; i++) {
        charStringsIndex.add(glyphs[i]);
      }
      cff.charStrings = charStringsIndex;
      var privateDict = new CFFPrivateDict();
      privateDict.setByName("Subrs", null); 
      var fields = [
        "BlueValues",
        "OtherBlues",
        "FamilyBlues",
        "FamilyOtherBlues",
        "StemSnapH",
        "StemSnapV",
        "BlueShift",
        "BlueFuzz",
        "BlueScale",
        "LanguageGroup",
        "ExpansionFactor",
        "ForceBold",
        "StdHW",
        "StdVW",
      ];