Problem with bank statements

Back up all data.

Triple-click the line of text below to select it, the copy the selected text to the Clipboard (command-C):

/Library/Internet Plug-ins

In the Finder, select

Go ▹ Go to Folder

from the menu bar, or press the key combination shift-command-G. Paste (command-V) into the text box that opens, then press return.

From the folder that opens, remove any items that have the letters “PDF” in the name. You may be prompted for your login password. Then quit and relaunch Safari, and test.

I've seen an unconfirmed report that the "Silverlight" web plugin distributed by Microsoft can also interfere with PDF display in Safari, so you might need to remove it as well, if applicable.

If you still have the issue, repeat with this line:

~/Library/Internet Plug-ins

If you don’t like the results of this procedure, restore the items from the backup you made before you started. Relaunch Safari again.

I read this sometimes occurs when you have Java (not Javascript) enabled. I'm not sufficiently savvy to understand if Linc's suggestion incorporates this but I am sure he will clarify if needs be.