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
if (version >= 0x00010000 && tables.maxp.length >= 22) {
          tables.maxp.data[26] = glyphsInfo.maxSizeOfInstructions >> 8;
          tables.maxp.data[27] = glyphsInfo.maxSizeOfInstructions & 255;
        }
      }
      if (!tables.hhea) {
        throw new FormatError('Required "hhea" table is not found');
      }
      
      
      if (tables.hhea.data[10] === 0 && tables.hhea.data[11] === 0) {
        tables.hhea.data[10] = 0xff;
        tables.hhea.data[11] = 0xff;
      }
      
      
      var metricsOverride = {
        unitsPerEm: int16(tables.head.data[18], tables.head.data[19]),
        yMax: int16(tables.head.data[42], tables.head.data[43]),
        yMin: signedInt16(tables.head.data[38], tables.head.data[39]),
        ascent: int16(tables.hhea.data[4], tables.hhea.data[5]),
        descent: signedInt16(tables.hhea.data[6], tables.hhea.data[7]),
      };
      
      this.ascent = metricsOverride.ascent / metricsOverride.unitsPerEm;
      this.descent = metricsOverride.descent / metricsOverride.unitsPerEm;
      
      if (tables.post) {