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Following are information obtained from the LINK provided in the 1st post. No further information are available on-hand, other than feedback in this thread.
Here is the list of various functions for PDF file viewing and management.
View PDF files with accuracy
Play embedded multimedia files of audio and video files (Must be iOS compatible)
Able to use embedded hyperlinks (Go To Page and URLs)
Smart zooming by double-tapping to fit block width
Zoom In with pinch out or double tap
Zoom Out with pinch In or two-finger tap
Text reflow with font size, color & font style (bold & italic)
Night reading mode supported for text reflow
Thumbnail view
Text search and highlighted result
Open password-protected PDF files
Convenient page navigation using thumbnail scroll images
Jump to a specific page by its page number
Outlines
Bookmarks
Landscape view
2. Functions for PDF File Management
File list view
Sorting by Name / Date / File Size
File search by File Name
List of the recently-viewed PDF files
Various file transfer to device - USB transfer via iTunes, WiFi connection, URL link download
Convenient file management - Fold Creation / Copy / Cut / Paste / Delete / Rename
I bought the App, and it worked really good on PDF embedded with audio file.