Adobe Acrobat Reader 8 must be installed on the server. After installation the PDF file type must be added to the search index.
Next steps:
1. Open your Search Settings.
2. Select File Types, click Add File Type.
3. Enter pdf in the text box and click OK.
4. Download the PDF icon from: http://www.iconarchive.com/category/application/adobe-family-icons-by-de..., give the icon a name.
5. Save the icon in c:\Program Files\Common Files\Microsoft Shared\web server extensions\12\TEMPLATE\IMAGES, edit the Docicon.xml file to include the PDF icon.
6. Navigate to c:\Program Files\Common Files\Microsoft Shared\web server extensions\12\TEMPLATE\XML.
7. Open the DOCICON.XML file in Notepad.
8. Add an entry for the PDF icon ‘Mapping Key=”pdf” Value=”pdficon.gif” /’ (replace the single quotes with angle brackets).
9. Save and close the file, right click the file, and select ‘Properties’.
10. Select the ‘Security Tab’ then click ‘Add’, add ‘Read’ and ‘Read & Execute’ permissions ‘Domain Users’.