Attach (recommended) or Link to PDF file here:
[test.pdf](https://github.com/mozilla/pdf.js/files/6715502/test.pdf)

Configuration:
- Web browser and its version: Google Chrome Version 91.0.4472.114 
- Operating system and its version: Windows 10 Enterprise
- PDF.js version: 
- Is a browser extension: yes

Steps to reproduce the problem:
1. download file
2. open file



What is the expected behavior? (add screenshot)
show symbol
![image](https://user-images.githubusercontent.com/50500976/123409847-55ca8800-d5b7-11eb-9e5b-c7f3b33c00e1.png)

What went wrong? (add screenshot)
Does not show symbol
![image](https://user-images.githubusercontent.com/50500976/123409707-274cad00-d5b7-11eb-9a64-b11dcf3cdc3f.png)
Link to a viewer (if hosted on a site other than mozilla.github.io/pdf.js or as Firefox/Chrome extension): Latest Version Chrome extension

fileType = "TrueType";
    }
  } else if (isOpenTypeFile(file)) {
    if (composite) {
      fileType = "CIDFontType2";
    } else {
      fileType = "OpenType";
    }
  } else if (isType1File(file)) {
    if (composite) {
      fileType = "CIDFontType0";
    } else {
      fileType = type === "MMType1" ? "MMType1" : "Type1";
    }
  } else if (isCFFFile(file)) {
    if (composite) {
      fileType = "CIDFontType0";
      fileSubtype = "CIDFontType0C";
    } else {
      fileType = type === "MMType1" ? "MMType1" : "Type1";
      fileSubtype = "Type1C";
    }
  } else {
    warn("getFontFileType: Unable to detect correct font file Type/Subtype.");
    fileType = type;
    fileSubtype = subtype;
  }
  return [fileType, fileSubtype];
}
function buildToFontChar(encoding, glyphsUnicodeMap, differences) {