Refer to the below url
Getting started with Microsoft Source Code Analyzer for SQL Injection
https://techcommunity.microsoft.com/t5/sql-server/getting-started-with-microsoft-174-source-code-analyzer-for-sql/ba-p/383452
That article does indeed have a download link. However when you click it, there is nothing to download.
And maybe not that surprising, since the blog post is an announcement for a CTP and it was originally published in 2008.
I don't know anything about this tool, but the Google hits are all quite old. Some refer to a 1.3, but they are not from microsoft.com. It could be that the tool never made RTM, and the CTP is all there was. In any case, it does not seem to be available now.