The PDF Embedder plugin does not collect or save any personal user data. The plugin only provides the means to display an interactive PDF viewer on your site.
The Premium and Secure versions do record the number of times a document is viewed and/or downloaded if you enable that option within the plugin settings and this is stored in your database as part of the documents metadata, but it does not record any information (name, email address, IP address, location, etc.) of the user that viewed/downloaded the document.