Memory error when reading PDF file

You have not offered enough information to help solve the problem. PDFs don't really cause this type of problem - I would look to your software, and reinstall if necessary. On the other hand, simply restarting the machine could also clear the problem. Was the PDF made by Acrobat? If so, and if you determine that it is the PDF file itself that is genuinely destabilizing Acrobat, then you should report it to Acrobat Support.