Embedded links in PDF not recognised

[David]

Embedded links in PDF file not detected when scrolling.
Hand tool does not change to pointed finger when hovered over link.
Rt click ==> Copy link address, Select link address, operations not possible.
Lt click does not open link in browser.

OS is Ubuntu 18.04
qpdfview 0.4.18.99~2106~64~ubuntu18.04.1 amd64

Same behaviour seen with other open source viewers:-

    Evince 3.28.4-0ubuntu1.2 amd64
    xpdf 3.04-7 amd64
    Okular 1.10.3 Flatpak
    Okular 1.3.3 (4:17.12.3-0ubuntu1)

Hyperlinks in problematic PDF file work normally using:-

    Firefox 78.0.2 incorporated PDF viewer
    Foxit Reader free 2.4.4.0911
    Master PDF Editor 5.5.38

Report below was produced with "pdfinfo" command.
Note errors. Note producer and creator.

$ pdfinfo 20200724.pdf
Title: SSSS
Subject: TTTT
Author: RRRR
Creator: Acrobat PDFMaker 20 for Word
Producer: Adobe PDF Library 20.9.95
CreationDate: Tue Jun 23 12:09:43 2020 AEST
ModDate: Tue Jun 23 12:09:46 2020 AEST
Tagged: yes
UserProperties: no
Suspects: no
Form: none
Syntax Error: Invalid object stream
Internal Error: xref num 730 not found but needed, try to reconstruct<0a>
JavaScript: no
Pages: 6
Encrypted: no
Page size: 595.32 x 841.92 pts (A4)
Page rot: 0
File size: 443527 bytes
Optimized: yes

Report below by "pdfinfo" command is from file with
normal link behaviour published by same entity.
Note creator and producer.

$ pdfinfo 20200724.pdf
Title: SSSS
Subject: TTTT
Author: RRRR
Creator: Acrobat PDFMaker 20 for Word
Producer: Adobe PDF Library 20.9.95
CreationDate: Tue Jun 23 12:09:43 2020 AEST
ModDate: Tue Jun 23 12:09:46 2020 AEST
Tagged: yes
UserProperties: no
Suspects: no
Form: none
Syntax Error: Invalid object stream
Internal Error: xref num 730 not found but needed, try to reconstruct<0a>
JavaScript: no
Pages: 6
Encrypted: no
Page size: 595.32 x 841.92 pts (A4)
Page rot: 0
File size: 443527 bytes
Optimized: yes

Problematic PDF is attached.

Thank you for your interest.

[Raoul Polo (raoul5557)]

Same problem on FreeBSD