PDF Ink Density

Question from the Acrobat Facebook page: https://www.facebook.com/adobeacrobat/posts/10150284122547319
 
OK, does anybody know how to do this in Acrobat, maybe using Enfocus Pitstop? I have a pdf that has too high ink density. I want to preserve the color balance but lower the ink density to 300 total. I can do this by opening each image in photshop, convert it to RGB using Adobe RGB (1998) working space, then back to CMYK using U.S. Web Coated (SWOP) v2. I was hoping there's an action or different tool I can use to achieve this globally.