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

constructor(name, file, properties) {
    this.name = name;
    this.psName = null;
    this.mimetype = null;
    this.disableFontFace = false;
    this.loadedName = properties.loadedName;
    this.isType3Font = properties.isType3Font;
    this.missingFile = false;
    this.cssFontInfo = properties.cssFontInfo;
    this._charsCache = Object.create(null);
    this._glyphCache = Object.create(null);
    this.isSerifFont = !!(properties.flags & FontFlags.Serif);
    this.isSymbolicFont = !!(properties.flags & FontFlags.Symbolic);
    this.isMonospace = !!(properties.flags & FontFlags.FixedPitch);
    let type = properties.type;
    let subtype = properties.subtype;
    this.type = type;
    this.subtype = subtype;
    let fallbackName = "sans-serif";
    if (this.isMonospace) {
      fallbackName = "monospace";
    } else if (this.isSerifFont) {
      fallbackName = "serif";
    }
    this.fallbackName = fallbackName;
    this.differences = properties.differences;
    this.widths = properties.widths;
    this.defaultWidth = properties.defaultWidth;
    this.composite = properties.composite;
    this.cMap = properties.cMap;