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


data[offset + 1] = (value >> 16) & 0xff;
            data[offset + 2] = (value >> 8) & 0xff;
            data[offset + 3] = value & 0xff;
          };
        } else {
          itemSize = 2;
          itemDecode = function fontItemDecode(data, offset) {
            return (data[offset] << 9) | (data[offset + 1] << 1);
          };
          itemEncode = function fontItemEncode(data, offset, value) {
            data[offset] = (value >> 9) & 0xff;
            data[offset + 1] = (value >> 1) & 0xff;
          };
        }
        
        var numGlyphsOut = dupFirstEntry ? numGlyphs + 1 : numGlyphs;
        var locaDataSize = itemSize * (1 + numGlyphsOut);
        
        var locaData = new Uint8Array(locaDataSize);
        locaData.set(loca.data.subarray(0, locaDataSize));
        loca.data = locaData;
        
        var oldGlyfData = glyf.data;
        var oldGlyfDataLength = oldGlyfData.length;
        var newGlyfData = new Uint8Array(oldGlyfDataLength);