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 i, j;
        const locaEntries = [];
        
        for (i = 0, j = 0; i < numGlyphs + 1; i++, j += itemSize) {
          let offset = itemDecode(locaData, j);
          if (offset > oldGlyfDataLength) {
            offset = oldGlyfDataLength;
          }
          locaEntries.push({
            index: i,
            offset,
            endOffset: 0,
          });
        }
        locaEntries.sort((a, b) => {
          return a.offset - b.offset;
        });
        
        
        
        for (i = 0; i < numGlyphs; i++) {
          locaEntries[i].endOffset = locaEntries[i + 1].offset;
        }
        
        locaEntries.sort((a, b) => {
          return a.index - b.index;
        });
        var missingGlyphs = Object.create(null);
        var writeOffset = 0;
        itemEncode(locaData, 0, writeOffset);