Malicious PDF — malware analysis report

Static analysis result for SHA-256 284207ffe92f3247…

MALICIOUS

PDF

42.4 KB Created: 2020-09-02 00:02:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 250fedb97cfdd7792631bb8809163dd1 SHA-1: b5a1a7607db5a5369394c29224b0ba09ddfb8c62 SHA-256: 284207ffe92f324758ddfee47d7239b6b2ea85eed0ddedf623b80bd24e721884
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, directing users to 'https://ttraff.cc/wix'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to shopify.com. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/wix?keyword=apa+format+bibliography+maker', suggesting a lure related to academic formatting to entice clicks to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.cc/wix?keyword=apa+format+bibliography+maker
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nagexonulelaxefirulilona.pdf
    • https://cdn.shopify.com/s/files/1/0438/5082/5893/files/batman_arkham_knight_the_perfect_crime_locations.pdf
    • https://cdn.shopify.com/s/files/1/0447/9637/9285/files/montreal_convention.pdf
    • https://cdn.shopify.com/s/files/1/0429/6297/6921/files/60264897522.pdf
    • https://cdn.shopify.com/s/files/1/0439/4031/5294/files/fumipedimugabojika.pdf
    • https://cdn.shopify.com/s/files/1/0437/3980/7893/files/believe_you_can_book.pdf
    • https://static.usrfiles.com/ugd/ea9bdf_90fed050073d4753974c096d1e912bf1.pdf
    • https://static.usrfiles.com/ugd/1f2646_e57f8b4225144dd2a1c2958ef19aad2d.pdf
    • https://static.usrfiles.com/ugd/36d413_1d32353a1d71425cb792dfceacf8d4c9.pdf
    • https://static.usrfiles.com/ugd/d99ef3_f749205bc41949ac833f8725fb6c13e1.pdf
    • https://static.usrfiles.com/ugd/ec0c41_1066e76d105442be9ada83e0e7cd7286.pdf
    • https://cdn.shopify.com/s/files/1/0448/4582/6205/files/madison_ginley.pdf
    • https://cdn.shopify.com/s/files/1/0435/8792/8223/files/alliterative_revival.pdf
    • https://cdn.shopify.com/s/files/1/0439/7996/4574/files/89803860370.pdf
    • https://cdn.shopify.com/s/files/1/0432/6231/2616/files/cutaneous_abscess_treatment_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0427/5775/0951/files/godumipawidiveg.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_off0000680e.bin
d893b43a329b381de496947db0b730664572085acdb49bc1f2cba69615278eaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x680E 5432 bytes
font_01_sfnt_off00007a6b.bin
2e633fbd16194e3dd47e46b4974c31034e1d09cac71ab55c7ea3ff5c9c1b7f36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A6B 10096 bytes

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