What to do when PDF files do not open correctly
or when your browser displays a blank white screen after trying to open the PDF file...

Solution 1

If the Adobe Acrobat viewer doesn't display PDF files inside your Web browser as expected try disabling the "View In Browser" or "Web Browser Integration" feature in your Adobe Acrobat viewer (for plug-in and standard version). Doing this will force your Acrobat viewer to display PDF outside your browser in a separate window. In most cases this will fix your problem. Shown below is how to disable "Web Browser Integration".
Go to <Edit><Preferences><General><Option> and disable Display PDF in browser

Solution 2
Download PDF to hard drive
Make sure that the Acrobat viewer can read the PDF file by downloading it to your hard disk and then viewing it in the browser:
In Netscape Navigator 3.x or later:
Right-click (Windows) or hold down the mouse button (Mac OS) on the link to the PDF file, then choose Save Link As from the pop-up menu.
In the Save As dialog box, specify a name and location for the PDF file, and then click Save.
Choose one of the following options to open the PDF file:
- In Navigator 3.x (Windows/Mac OS) Choose File > Open File.
- In Navigator 4.x (Windows) Choose File > Open Page > Choose File.
- In Navigator 4.x (Mac OS) Choose File > Open > Page in Navigator.
If you're using Navigator for Windows, choose either All Files or Acrobat files from the Files Of Type pop-up menu.
Select the PDF file you saved in step 2 and click Open. The Acrobat viewer should open the PDF file inside the browser window.
In Microsoft Internet Explorer 4.0 or later:
Right-click (Windows) or hold down the mouse button (Mac OS) on the link to the PDF file, and then choose Save Target As from the pop-up menu.
In the Save As dialog box, specify a name and location for the PDF file, and then click Save.
Choose File > Open and click Browse. 
Choose All Files from the Files Of Type pop-up menu.
Select the PDF file you saved in step 2 and click Open. The Acrobat viewer should open the PDF file inside the browser window.