Is there a way to record views to a pdf document

I have a simple application.cfc file that I placed in the folder with the pdf documents. I need to record the useage to these documents for management. It will record the views when a user goes to a html page or cfm page but not the pdf. Is there a way to count these?

I'm including my hit counter code from the application.cfc file although it does work for web pages. 


<cffunction name="OnRequestStart" returntype="boolean" output="true">

<cfquery name="addhit" datasource"#ds#">

     insert into hits

(remote_address, page, date)

Values

('#remote_addr#','#script_name#',''#today#')

</cfquery>

<cfreturn true>

</cffunction>

I've also tried moving this in the folder above thinking that may affect it but still the same results - no counts for the pdf documents.  Any suggestions?