PDF icon not displayed in the SharePoint search results.

Follow the steps below to enable the display of pdf icon in the SharePoint search result.

1. Search the internet for a pdf image, preferably a jpg or gif of size 16X16. You can use the image below as well.

2. Copy the pdf image into the images in the below location

C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\12\TEMPLATE\IMAGES

3. Find in the DOCICON.xml file present in the below location

C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\12\TEMPLATE\XML

4. Add the values <mapping key="pdf" value="yourimagefilename"> in the <byextension></byextension> section.

5. Reset IIS.

6. Search for any pdf file on the portal and the image should be visible now.