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 (op >= 0x71 && op <= 0x75) {
              n = stack.pop();
              if (!isNaN(n)) {
                stackDelta = -n * 2;
              }
            }
            while (stackDelta < 0 && stack.length > 0) {
              stack.pop();
              stackDelta++;
            }
            while (stackDelta > 0) {
              stack.push(NaN); 
              stackDelta--;
            }
          }
        }
        ttContext.tooComplexToFollowFunctions = tooComplexToFollowFunctions;
        var content = [data];
        if (i > data.length) {
          content.push(new Uint8Array(i - data.length));
        }
        if (lastDeff > lastEndf) {
          warn("TT: complementing a missing function tail");
          
          
          content.push(new Uint8Array([0x22, 0x2d]));
        }
        foldTTTable(table, content);
      }
      function checkInvalidFunctions(ttContext, maxFunctionDefs) {