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


dest[offset] = (num >> 8) & 0xff;
    dest[offset + 1] = num & 0xff;
  }
  function writeInt32(dest, offset, num) {
    dest[offset] = (num >> 24) & 0xff;
    dest[offset + 1] = (num >> 16) & 0xff;
    dest[offset + 2] = (num >> 8) & 0xff;
    dest[offset + 3] = num & 0xff;
  }
  function writeData(dest, offset, data) {
    var i, ii;
    if (data instanceof Uint8Array) {
      dest.set(data, offset);
    } else if (typeof data === "string") {
      for (i = 0, ii = data.length; i < ii; i++) {
        dest[offset++] = data.charCodeAt(i) & 0xff;
      }
    } else {
      
      for (i = 0, ii = data.length; i < ii; i++) {
        dest[offset++] = data[i] & 0xff;
      }
    }
  }
  
  function OpenTypeFileBuilder(sfnt) {