Remove Hidden Information tool

Hi,
I would have a question regarding Acrobat's 'Remove Hidden Information' tool. Under Tools, Protection there is the 'Remove Hidden Information' tool. When I click it the results can be seen on the left side. Under 'Comments and markups' the sum of objects can be seen. I figured out that it detects bookmarks, links (internal, external) and objects described here: http://help.adobe.com/en_US/acrobat/X/pro/using/WS58a04a822e3e50102bd615109794195ff-7e7f.w .html.
But it also detects some other objects as well which I am not aware of (based on the number of objects detected). I also know that it counts 2 objects when using 'Replace text' from the link above.
Does anybody happen to know what additional types of objects does this tool detects and how to search for them in the document?
Thanks for your help,
Csanad
I use Acrobat version 10.1.5

The hidden text is the collection of glyphs on the PDF page that use text rendering mode 3 (no stroke, no fill).
Any links placed in association with such hidden text are not "hidden" (that is not how it works with PDF Link annotations - see ISO 32000-1:2008).
Any Link annotation placed in a PDF are the same as any other Link annotation (with the exception, of course, of whatever the link's Action happens to be).
So, no special sauce for links that were placed in association with now removed "hidden text".
In context of what you've written it may be that you will have to select - Ctrl+click the Link annotations of interest then tap the Delete key.
Be well...

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Remove Hidden Information tool

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