There is really no need for expansion.
- create and create PDF Document content type [admin / structure / types / add]
- create a view with open filters [admin / structure / views / add]
Easy as that.
You can naturally improve your catalog:
- Library for extracting meta-information from PDF documents [example: http://www.pdfparser.org/] , for quick creation of nodes [node / add]
- Some CSS styles
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