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
}
    }
    nameTable += strings.join("") + stringsUnicode.join("");
    return nameTable;
  }
  Font.prototype = {
    name: null,
    font: null,
    mimetype: null,
    disableFontFace: false,
    get renderer() {
      var renderer = FontRendererFactory.create(this, SEAC_ANALYSIS_ENABLED);
      return shadow(this, "renderer", renderer);
    },
    exportData(extraProperties = false) {
      const exportDataProperties = extraProperties
        ? [...EXPORT_DATA_PROPERTIES, ...EXPORT_DATA_EXTRA_PROPERTIES]
        : EXPORT_DATA_PROPERTIES;
      const data = Object.create(null);
      let property, value;
      for (property of exportDataProperties) {
        value = this[property];
        
        if (value !== undefined) {
          data[property] = value;
        }
      }
      return data;
    },
    fallbackToSystemFont(properties) {