Do not search for "Adobe Acrobat Reader offline installer" on random download sites. Many of those files contain adware or malware.
Yes. Adobe Acrobat Reader DC is free for viewing, printing, signing, and commenting on PDFs. You only need to pay for "Adobe Acrobat Pro DC" (which allows editing and creation). Do not search for "Adobe Acrobat Reader offline
After installation, it is wise to double-check that you got the right architecture. Do not search for "Adobe Acrobat Reader offline