Malicious PDF — malware analysis report

Static analysis result for SHA-256 582254cc4d1ea775…

MALICIOUS

PDF

43.9 KB Created: 2020-09-03 00:16:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99022827a7779a20dad3bd8b25c7dc6d SHA-1: d46b3d4be1946ab6d11f75a4554078f4a71ed9e0 SHA-256: 582254cc4d1ea775d7a88a5bb2ec827eae4455e50563e60e21d3cf57d729d71e
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This URL is presented within the document body, suggesting a lure to trick the user into clicking it. The PDF also contains a large number of embedded links, many of which point to 'cdn.shopify.com' and 'usrfiles.com', potentially as part of a link farm or to obscure the malicious redirector. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/wix?keyword=types+of+abnormal+behavior+pdf
    • https://static.usrfiles.com/ugd/b11f6d_44f0719616d14e6489dd65df5df32848.pdf
    • https://static.usrfiles.com/ugd/7f16bd_dbb27534298b43679ae7f5ac2707ca81.pdf
    • https://static.usrfiles.com/ugd/0ebc1f_860cdd99b15f4e139942828ed7167b7a.pdf
    • https://cdn.shopify.com/s/files/1/0468/8809/1805/files/guyton_and_hall_medical_physiology_table_of_contents.pdf
    • https://cdn.shopify.com/s/files/1/0432/0142/9662/files/67442580488.pdf
    • https://cdn.shopify.com/s/files/1/0431/5519/4011/files/58166863811.pdf
    • https://cdn.shopify.com/s/files/1/0436/9488/2984/files/never_cry_wolf.pdf
    • https://static.usrfiles.com/ugd/fa32a6_3f01e298e7894ea4a3a70cc36da28082.pdf
    • https://static.usrfiles.com/ugd/b8c837_b7f2f76f30004373b87fe5da67f0af9e.pdf
    • https://cdn.shopify.com/s/files/1/0432/5736/4638/files/hack_apk_app_store.pdf
    • https://cdn.shopify.com/s/files/1/0431/8851/9080/files/monebufebogaxazajonikabaz.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006eeb.bin
5a9e4770a9c70dd72263219b6322009b3f8bbcc07389299bc9a0db8f7a714ffc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EEB 5532 bytes
font_01_sfnt_off00008194.bin
9694246066a910536d59dac07c6aa7e800d88e2e553e40774bdcc13dfa4694c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8194 9756 bytes

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