Adobe Apollo will marry PDF and Flash formats but the technology is still in early stages.
But Adobe has another tool called Acrobat that allows you embed any SWF Flash file in a PDF document without requiring Apollo.
To add movies, animations, and sounds to your PDF presentation, just open the Advanced Editing toolbar in Adobe Acrobat and choose the object you wish to add. More details on embedding Flash in PDF are available in this tutorial.
The process is similar for adding audio files (Quicktimie MOV, WAV, MP3) to PDF mulitimedia documents. Select the Sound tool and draw an area anywhere on the PDF page where you have to embed the sound file. More details on Adobe's site here.