When you search for Adobe Portable Document Format (PDF) documents in SharePoint, the PDF documents are returned in the search results as you expect. However, the icon for each of the PDF documents that are listed in the search results is missing.
Additionally, on the Specify File Types to Include page of the portal site, the icon that is typically displayed next to the .pdf extension is missing.
Additionally, on the Specify File Types to Include page of the portal site, the icon that is typically displayed next to the .pdf extension is missing.