What is this little square box and how do I get rid of them?

Hi tiffanyf,

As mentioned, you are getting a square box on a pdf file, would it be possible to share the pdf file you are working with to check this at our end? To share the file here in the forums, refer to the steps given in this link: How to share a file using Adobe Document Cloud

You may also share the link for the pdf via private message - How Do I Send Private Message

Also, let us know the application you are using- Adobe Reader or Adobe Acrobat?

Thanks,

Shivam