The risk-to-reward ratio is disastrous. You might save $50–$200 upfront, but you expose your personal data, computer stability, and legal standing to unknown attackers. The free, legitimate alternatives (LibreOffice, OnlyOffice) handle 95% of what Office 2013 does without any of the malware.
Microsoft does offer legitimate "volume license" editions that can be pre-configured for automatic activation within large organizations. However, versions found on public file-sharing sites are almost always illegally modified "cracked" versions. Key Features of Office 2013 Office 2013 Preactivated Download
Office 2013 preactivated download refers to a version of Microsoft Office 2013 that has already been activated, eliminating the need for a valid product key. This allows users to download and install Office 2013 without having to purchase a license or enter a product key during installation. The risk-to-reward ratio is disastrous
These versions often use third-party "cracks," modified executables, or emulated KMS (Key Management Service) environments to fool the software into thinking it has a valid license. This allows users to download and install Office