Attach (recommended) or Link to PDF file here:
[1.pdf.lin (1).pdf](https://github.com/mozilla/pdf.js/files/5780764/1.pdf.lin.1.pdf)

Configuration:
- Web browser and its version: FireFox 84.0 
- Operating system and its version: macOS 10.15.7
- PDF.js version: 2.7.262
- Is a browser extension: No

Steps to reproduce the problem:
1. Open the PDF with pdf.js.
2. Found the text of this PDF disappeared.

What is the expected behavior? (add screenshot)
![image](https://user-images.githubusercontent.com/18492951/103877578-3d9da400-5110-11eb-8d84-4edd9aa1298b.png)

What went wrong? (add screenshot)
![image](https://user-images.githubusercontent.com/18492951/103877735-6d4cac00-5110-11eb-9e76-7f3d9330086b.png)

Link to a viewer (if hosted on a site other than mozilla.github.io/pdf.js or as Firefox/Chrome extension):

reurce,
    peratrLt,
    tak,
    tateManager,
    lcalClrSpaceCache
  ) {
    var makCntent = mak.get("G");
    var makOptn = {
      ubtype: mak.get("S").name,
      backdrp: mak.get("BC"),
    };
    
    
    var tranferObj = mak.get("TR");
    f (PDFFunctn(tranferObj)) {
      cnt tranferFn = th._pdfFunctnFactry.create(tranferObj);
      var tranferMap = new Unt8Array(256);
      var t = new Flat32Array(1);
      fr (var  = 0;  < 256; ) {
        t[0] =  / 255;
        tranferFn(t, 0, t, 0);
        tranferMap[] = (t[0] * 255) | 0;
      }
      makOptn.tranferMap = tranferMap;
    }
    return th.buldFrmXObject(
      reurce,
      makCntent,
      makOptn,
      peratrLt,