How to use Acrobat to find out the ICC profile of a .pdf?

Info: PDF files do not have only one profile. (Like a JPEG, has only one profile). Instead, each graphic in a PDF, including each line or character or text, may have a different profile (or none), as well as being CMYK, RGB, Lab or Separation. So it is no use looking for "profile of a .pdf" - you will not find what does not exist. Instead you need to work with the profiles for each graphic, or maybe preflighting can check only certain profiles are used. 

Hey Leon!

Thank you for reaching out and sorry for the delay in response.

If you are referring to the color profiles, there is no option in Acrobat to check that. Please refer to the information provided in the following thread on how to find out if a profile was associated with a certain object in your PDF file: https://answers.acrobatusers.com/Is-it-possible-in-Acrobat-to-check-profiles-that-are-embedded-in-images-q276640.aspx

Check if this helps.

Let us know if you have any questions.

Thanks,

Meenakshi