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


var accentOffset = {
            x: seac[0] * matrix[0] + seac[1] * matrix[2] + matrix[4],
            y: seac[0] * matrix[1] + seac[1] * matrix[3] + matrix[5],
          };
          var charCodes = getCharCodes(mapping, glyphId);
          if (!charCodes) {
            
            
            continue;
          }
          for (let i = 0, ii = charCodes.length; i < ii; i++) {
            var charCode = charCodes[i];
            
            
            var charCodeToGlyphId = newMapping.charCodeToGlyphId;
            var baseFontCharCode = createCharCode(
              charCodeToGlyphId,
              baseGlyphId
            );
            var accentFontCharCode = createCharCode(
              charCodeToGlyphId,
              accentGlyphId
            );
            seacMap[charCode] = {
              baseFontCharCode,
              accentFontCharCode,
              accentOffset,
            };
          }
        }