Do you have a Dropbox account (or any other online storage account ... other than iCloud)? With Dropbox, you can upload the file to your online Dropbox and then access the PDF from your [free] Dropbox app on the iPad. Then, Dropbox has an "Open In..." function so you can choose any PDF reader to view the file.
If you don't have Dropbox, it's an easy sign up, with the first 2GB of data free. For a lot of people - 2GB is plenty and all they ever need or will use.
Just another idea...
Marilyn