ipdf has got the feature you describe already.
If you don't have arrow icons in the ipdf toolbar, your iLiad has got an old firmware.
Edit I: [Oh, I was a bit late. When I clicked the "new reply" button, daudi's answer where not there.]
Edit II:
Quote:
Originally Posted by ILiad Firmware V2.11 wiki
PDF Viewer
* Back and Forward Buttons: Easily navigate through PDF documents using hyper links via the back and forward button.
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https://wiki.mobileread.com/wiki/ILiad_Firmware_V2.11
Software release of v2.11 was 09/26/2007; current firmware is 2.12.