Attach (recommended) or Link to PDF file here:
[test.pdf](https://github.com/mozilla/pdf.js/files/6270827/test.pdf)
Configuration:
- Web browser and its version:chrome 89
- Operating system and its version:win10
- PDF.js version: 2.4/2.7/2.8 no working
- Is a browser extension: no 

What is the expected behavior? (add screenshot)
![image](https://user-images.githubusercontent.com/18545199/113852392-1ae26080-97cf-11eb-9dc9-0cecf52d267b.png)

What went wrong? (add screenshot)
![1617791294(1)](https://user-images.githubusercontent.com/18545199/113852355-10c06200-97cf-11eb-8672-598750f1093a.jpg)


console this log : **FormatError: TrueType Collection does not contain "DCWGQU+CambriaMath" font** 

any solution?thanks
var strBufUnicode = [];
      for (j = 0, jj = str.length; j < jj; j++) {
        strBufUnicode.push(string16(str.charCodeAt(j)));
      }
      stringsUnicode.push(strBufUnicode.join(""));
    }
    var names = [strings, stringsUnicode];
    var platforms = ["\x00\x01", "\x00\x03"];
    var encodings = ["\x00\x00", "\x00\x01"];
    var languages = ["\x00\x00", "\x04\x09"];
    var namesRecordCount = strings.length * platforms.length;
    var nameTable =
      "\x00\x00" + 
      string16(namesRecordCount) + 
      string16(namesRecordCount * 12 + 6); 
    
    var strOffset = 0;
    for (i = 0, ii = platforms.length; i < ii; i++) {
      var strs = names[i];
      for (j = 0, jj = strs.length; j < jj; j++) {
        str = strs[j];
        var nameRecord =
          platforms[i] + 
          encodings[i] + 
          languages[i] + 
          string16(j) + 
          string16(str.length) +
          string16(strOffset);
        nameTable += nameRecord;
        strOffset += str.length;