Attach (recommended) or Link to PDF file here: https://github.com/mozilla/pdf.js/files/7021521/sample.pdf

Configuration:
- Web browser and its version: Chrome
- Operating system and its version: Microsoft
- PDF.js: 2.2.228


What is the expected behavior? 
Embedded PDF Viewer should display right font with all characters

What went wrong? 
![image](https://user-images.githubusercontent.com/89254263/130225854-43467f78-e856-4a42-8e64-94bdfe479053.png)


Is it possible to add some other font? Is it possible to manage what encodings will be used?

Thank you in advantage

Regards Ladislav

t.Symbol = "Symbol";
  t["Times-Bold"] = "Times-Bold";
  t["Helvetica-Bold"] = "Helvetica-Bold";
  t["Courier-Bold"] = "Courier-Bold";
  t.ZapfDingbats = "ZapfDingbats";
  t["Times-Italic"] = "Times-Italic";
  t["Helvetica-Oblique"] = "Helvetica-Oblique";
  t["Courier-Oblique"] = "Courier-Oblique";
  t["Times-BoldItalic"] = "Times-BoldItalic";
  t["Helvetica-BoldOblique"] = "Helvetica-BoldOblique";
  t["Courier-BoldOblique"] = "Courier-BoldOblique";
  
  t.ArialNarrow = "Helvetica";
  t["ArialNarrow-Bold"] = "Helvetica-Bold";
  t["ArialNarrow-BoldItalic"] = "Helvetica-BoldOblique";
  t["ArialNarrow-Italic"] = "Helvetica-Oblique";
  t.ArialBlack = "Helvetica";
  t["ArialBlack-Bold"] = "Helvetica-Bold";
  t["ArialBlack-BoldItalic"] = "Helvetica-BoldOblique";
  t["ArialBlack-Italic"] = "Helvetica-Oblique";
  t["Arial-Black"] = "Helvetica";
  t["Arial-Black-Bold"] = "Helvetica-Bold";
  t["Arial-Black-BoldItalic"] = "Helvetica-BoldOblique";
  t["Arial-Black-Italic"] = "Helvetica-Oblique";
  t.Arial = "Helvetica";
  t["Arial-Bold"] = "Helvetica-Bold";
  t["Arial-BoldItalic"] = "Helvetica-BoldOblique";
  t["Arial-Italic"] = "Helvetica-Oblique";
  t["Arial-BoldItalicMT"] = "Helvetica-BoldOblique";
  t["Arial-BoldMT"] = "Helvetica-Bold";