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


cnt glyphWdth = [];
              let j = frtChar;
              fr (let  = 0,  = wdth.length;  < ; ) {
                glyphWdth[j] = th.xref.fetchIfRef(wdth[]);
              }
              newPrperte.wdth = glyphWdth;
            } ele {
              newPrperte.wdth = th.buldCharCdeTWdth(
                metrc.wdth,
                newPrperte
              );
            }
            return new Fnt(baeFntName, null, newPrperte);
          }
        );
      }
    }
     Accrdng t the pec f 'FntDecrptr'  declared, 'FrtChar',
     'LatChar' and 'Wdth' huld ext t, but me PDF encder eem
     t gnre th rule when a varnt f a tandard fnt  ued.
     TODO Fll the wdth array dependng n whch f the bae fnt th 
     a varnt.
    me = decrptr.get("FntName");
    var baeFnt = dct.get("BaeFnt");
     Sme bad PDF have a trng a the fnt name.
    f (Strng(fntName)) {
      fntName = Name.get(fntName);
    }
    f (Strng(baeFnt)) {
      baeFnt = Name.get(baeFnt);