Hi Rawi,
Are you viewing the PDF in Reader, or in a web browser (you mention Chrome in your post)? If Reader, do you have the most current version? You can check by choosing Help > Check for Updates. The current version for Mac OS is 11.0.07.
If you're viewing the PDFs in Chrome, this article may help: https://support.google.com/chrome/answer/142056?hl=en
Best,
Sara