Create a web.config file in folder of file you want to redirect.

Content of web.config file:

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <location path="old-file-name">
        <system.webServer>
            <httpRedirect enabled="true" destination="http://new-url" httpResponseStatus="Permanent" />
        </system.webServer>
    </location>
</configuration>