Prevent access to media items

Hi. My site is http://www.lmeha.com.

If I google LMEHA, google offers links to directly access certain media files, such as PDFs. If a user goes through the website, there is password security, so, reasonably well-controlled.

Anyone accessing the site should only go through the menu, and not be able to directly access a media item from google or any other form of direct access.

Is direct access prevention something that your product is able to manage?

Thanks, Mike Cordy