Intent my app from gmail while opening attached files of custom format

Question

This is my intent filter

 <!-- For email attachments -->
        <intent-filter>
            <action android:name="android.intent.action.VIEW" />
            <category android:name="android.intent.category.DEFAULT" />
            <data
                android:mimeType="application/*"
                android:pathPattern=".*\\.ccd"
                android:scheme="content" />
        </intent-filter>

        <!--  For file browsers -->
        <intent-filter>
            <action android:name="android.intent.action.VIEW" />
            <category android:name="android.intent.category.DEFAULT" />
            <data
                android:host="*"
                android:mimeType="*/*"
                android:pathPattern=".*\\.ccd"
                android:scheme="file" />
        </intent-filter>

Problem is that my app is opened when any file with unkown format is opened from gmail(eg: dat, zipc etc). It is also suggested while opening pdf files. I need to only open ccd file from gmail . How is that possible?