[Bug]: Certain Russian characters fail to render correctly in this viewer, although they display without issues in the Chrome browser.

[xiaobai2017666]

Attach (recommended) or Link to PDF file

PDF file link

90240601181 ASM14-125俄文说明书DCA02.pdf

Location in the PDF file

This is a one-page file. Please see the screenshot below for details on the first page.

Warnings/error messages

No content.

Web browser and its version

Chrome 142.0.7444.163

Operating system and its version

Windows 10 22H2 19045.6466

PDF.js version

"stableVersion": "5.4.394", "baseVersion": "1b427a3af5e0a40c296a3cafb08edbd36d973ff1", "versionPrefix": "5.4."

Is the bug present in the latest PDF.js version?

Yes

Is a browser extension

No

Steps to reproduce the problem

1. npx gulp generic
2. http://localhost:8888/test/pdfs/?frame, open file.

What is the expected behavior?

To ensure consistent display, open the file by dragging it directly into the Chrome browser.

What went wrong?

Certain Russian characters fail to render correctly in this viewer.

Link to a viewer

No response

Additional context

No response