SharePoint 2010 - Configuring Adobe PDF iFilter 9 for 64-bit platforms

I have seen some documentation out there on setting up the Adobe iFilter with SP 2010, but now Microsoft has officially published KB2293357

Install Windows Server 2008 following the SharePoint prerequisites (Pre-upgrade utility).
Install SharePoint 2010 with the complete option and run the PSconfig wizard.
Configure required Server Farm Topology. In this example we use a Single Server Farm.
Create a new Search Service application.

Configure Adobe iFilter based on steps mentioned below:

Install PDF iFilter 9.0 (64 bit) from https://www.adobe.com/support/downloads/detail.jsp?ftpID=4025 (https://www.adobe.com/support/downloads/detail.jsp?ftpID=4025)
Download PDF icon picture from Adobe web site https://www.adobe.com/misc/linking.html (https://www.adobe.com/misc/linking.html) and copy to C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\14\TEMPLATE\IMAGES\
Add the following entry in docIcon.xml file, which can be found at: C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\14\TEMPLATE\XML
<Mapping Key="pdf" Value="pdf16.gif" />
Add pdf file type on the File Type page under Search Service Application
Open regedit
Navigate to the following location:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office Server\14.0\Search\Setup\ContentIndexCommon\Filters\Extension
Right-click > Click New > Key to create a new key for .pdf
Add the following GUID in the default value
{E8978DA6-047F-4E3D-9C78-CDBE46041603}

Restart the SharePoint Server Search 14
Reboot the SharePoint servers in Farm
Create a Test site (with any out-of-box site template) and create a document library upload any sample PDF document(s).
Perform FULL Crawl to get search result.

Once the crawl is completed we will get search results.

NOTE: If this is a SharePoint Foundation 2010 environment additional steps will be required instead of step 4 above

Additional resources