Blocking Pdf Files From Direct Access Using .htaccess

Question

This question have been on SO quite a few times, i have tried all the available options but still i am having hard time blocking a pdf file from direct access using absolute URL.

I using the following code inside .htaccess file which is in the same folder where pdf's are

Order Allow,Deny
  <FilesMatch "^[^.]+\.(gif|jpe?g|png|pdf|doc|docx|txt|rtf|ppt|pptx|xls|mp4|mov|mp3|mpg|mpeg)$">
   Deny from all
  </FilesMatch>

When i access the directory of the pdf files it shows me a 403 forbidden access but the moment i enter the absolute url of the pdf it starts rendering the pdf in the browser.

Directory Url http://thetutlage.com/demo/pdfReader/files

Pdf Url :- http://thetutlage.com/demo/pdfReader/files/tracemonkey.pdf

Any help will be great. I have also tried using a redirect rule if a file has .pdf extension but that doesn't seems to be working as well.

Answer 1

Works fine:

Order Allow,Deny
Allow from all
<Files ~ "\.(gif|jpg|png|pdf)$">
Deny from all
</Files>