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
const ttcData = readTrueTypeCollectionData(font, this.name);
        header = ttcData.header;
        tables = ttcData.tables;
      } else {
        header = readOpenTypeHeader(font);
        tables = readTables(font, header.numTables);
      }
      let cff, cffFile;
      var isTrueType = !tables["CFF "];
      if (!isTrueType) {
        const isComposite =
          properties.composite &&
          ((properties.cidToGidMap || []).length > 0 ||
            !(properties.cMap instanceof IdentityCMap));
        
        if (
          (header.version === "OTTO" && !isComposite) ||
          !tables.head ||
          !tables.hhea ||
          !tables.maxp ||
          !tables.post
        ) {
          
          cffFile = new Stream(tables["CFF "].data);
          cff = new CFFFont(cffFile, properties);
          adjustWidths(properties);
          return this.convert(name, cff, properties);
        }
        delete tables.glyf;
        delete tables.loca;