Enable pdf extension in Magento Wysiwyg CMS.

Enable pdf extension in Magento Wysiwyg CMS

Create a new module and in config.xml do the follow:

<?xml version="1.0"?>
<config>
  <modules>
    <Company_Module>
      <version>0.1.0</version>
    </Company_Module>
  </modules>
  <adminhtml>
    <cms>
      <browser>
        <extensions>
          <allowed>
            <pdf>1</pdf>
          </allowed>
        </extensions>
      </browser>
    </cms>
  </adminhtml>
</config>

Ref: http://blog.mdnsolutions.com/index.php/enable-pdf-extension-on-wysiwyg-for-magento/