You will see a list of files. The primary file is:

Oracle SOA Suite 12c (12.2.1.4.0) is the latest stable version of the suite, released with a focus on hybrid integration and new reference configurations .

: This is the primary source for production-ready software. Search for "Oracle SOA Suite" and select version 12.2.1.4.0 . This portal provides the full distribution, including the Infrastructure and SOA specific installers.