Is is possible to fetch the WooCommerce attributes in the generated PDF files?

Yes, we have provided this feature in our plugin. Admin can now add Woo attributes for your products in the generated PDF files. You can do so by simply using the PDF snippets added when creating your custom templates under WP Swings→ PDF Generator for Wp→ Layout Settings→ Internal Page. This will automatically add Woo attributes to generated PDF files for live product pages.