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
file,
        header,
        metrics,
        numGlyphs,
        dupFirstEntry
      ) {
        if (!header) {
          if (metrics) {
            metrics.data = null;
          }
          return;
        }
        file.pos = (file.start ? file.start : 0) + header.offset;
        file.pos += 4; 
        file.pos += 2; 
        file.pos += 2; 
        file.pos += 2; 
        file.pos += 2; 
        file.pos += 2; 
        file.pos += 2; 
        file.pos += 2; 
        file.pos += 2; 
        file.pos += 2; 
        file.pos += 2; 
        file.pos += 8; 
        file.pos += 2; 
        var numOfMetrics = file.getUint16();
        if (numOfMetrics > numGlyphs) {
          info(