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.Fairfield = true;
  t["FF Scala"] = true;
  t.Folkard = true;
  t.Footlight = true;
  t.FreeSerif = true;
  t["Friz Quadrata"] = true;
  t.Garamond = true;
  t.Gentium = true;
  t.Georgia = true;
  t.Gloucester = true;
  t["Goudy Old Style"] = true;
  t["Goudy Schoolbook"] = true;
  t["Goudy Pro Font"] = true;
  t.Granjon = true;
  t["Guardian Egyptian"] = true;
  t.Heather = true;
  t.Hercules = true;
  t["High Tower Text"] = true;
  t.Hiroshige = true;
  t["Hoefler Text"] = true;
  t["Humana Serif"] = true;
  t.Imprint = true;
  t["Ionic No. 5"] = true;
  t.Janson = true;
  t.Joanna = true;
  t.Korinna = true;
  t.Lexicon = true;
  t["Liberation Serif"] = true;
  t["Linux Libertine"] = true;
  t.Literaturnaya = true;