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


platformId === 3 &&
            encodingId === 1 &&
            (hasEncoding || !potentialTable)
          ) {
            useTable = true;
            if (!isSymbolicFont) {
              canBreak = true;
            }
          } else if (isSymbolicFont && platformId === 3 && encodingId === 0) {
            useTable = true;
            canBreak = true;
          }
          if (useTable) {
            potentialTable = {
              platformId,
              encodingId,
              offset,
            };
          }
          if (canBreak) {
            break;
          }
        }
        if (potentialTable) {
          file.pos = start + potentialTable.offset;
        }
        if (!potentialTable || file.peekByte() === -1) {
          warn("Could not find a preferred cmap table.");
          return {
            platformId: -1,