PDF reader on WP attachment page

We have an ACF repeater field attached to WP regular post type (posts). Repeater rows have one file upload custom field where our editor upload 1-3 .pdf file(s). We need to display the link to this file(s) on [login to view URL] pointing to WP attachment page where .pdf should be rendered through this PDF viewer plugin: [login to view URL] . To illustrate better the scheme, we need to achieve what is explained here: [login to view URL] , using pdf reader pointed above instead Google Viewer. Attachment page should match a specific theme and also preserve this theme sidebar functionality.