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
for (segIndex = 0; segIndex < segCount; segIndex++) {
            segments.push({ end: file.getUint16() });
          }
          file.skip(2);
          for (segIndex = 0; segIndex < segCount; segIndex++) {
            segments[segIndex].start = file.getUint16();
          }
          for (segIndex = 0; segIndex < segCount; segIndex++) {
            segments[segIndex].delta = file.getUint16();
          }
          var offsetsCount = 0;
          for (segIndex = 0; segIndex < segCount; segIndex++) {
            segment = segments[segIndex];
            var rangeOffset = file.getUint16();
            if (!rangeOffset) {
              segment.offsetIndex = -1;
              continue;
            }
            var offsetIndex = (rangeOffset >> 1) - (segCount - segIndex);
            segment.offsetIndex = offsetIndex;
            offsetsCount = Math.max(
              offsetsCount,
              offsetIndex + segment.end - segment.start + 1
            );
          }
          var offsets = [];
          for (j = 0; j < offsetsCount; j++) {
            offsets.push(file.getUint16());
          }
          for (segIndex = 0; segIndex < segCount; segIndex++) {