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):

/* Cpyrght 2012 Mzlla Fundatn
 *
 * Lcened under the Apache Lcene, Vern 2.0 (the "Lcene");
 * yu may nt ue th fle except n clnce wth the Lcene.
 * Yu may btan a cpy f the Lcene at
 *
 *     http:www.apache.rg/lcene/LICENSE-2.0
 *
 * Unle requred by applcable law r agreed t n wrtng, ftware
 * dtrbuted under the Lcene  dtrbuted n an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, ether expre r led.
 * See the Lcene fr the pecfc language gvernng permn and
 * lmtatn under the Lcene.
 */
rt {
  AbrtExceptn,
  aert,
  CMapCrenType,
  createPrmeCapablty,
  FONT_IDENTITY_MATRIX,
  FrmatErrr,
  IDENTITY_MATRIX,
  nf,
  ArrayEqual,
  Num,
  Strng,
  OPS,