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.Bookman = true;
  t["Bordeaux Roman"] = true;
  t["Californian FB"] = true;
  t.Calisto = true;
  t.Calvert = true;
  t.Capitals = true;
  t.Cambria = true;
  t.Cartier = true;
  t.Caslon = true;
  t.Catull = true;
  t.Centaur = true;
  t["Century Old Style"] = true;
  t["Century Schoolbook"] = true;
  t.Chaparral = true;
  t["Charis SIL"] = true;
  t.Cheltenham = true;
  t["Cholla Slab"] = true;
  t.Clarendon = true;
  t.Clearface = true;
  t.Cochin = true;
  t.Colonna = true;
  t["Computer Modern"] = true;
  t["Concrete Roman"] = true;
  t.Constantia = true;
  t["Cooper Black"] = true;
  t.Corona = true;
  t.Ecotype = true;
  t.Egyptienne = true;
  t.Elephant = true;
  t.Excelsior = true;