Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d116c152820baaa…

MALICIOUS

PDF

43.3 KB Created: 2020-08-19 06:27:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c154207d7e7cc59a75a7f4de778308cb SHA-1: 5b72ecda6128e285e9e6391d1583397fcf3962fb SHA-256: 2d116c152820baaaa8e518e303e002487ff56a4b27496c2f9aa2217c74b86b16
150 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically to 'https://ttraff.ru/pify?keyword=voluntary+acknowledgment+of+parentage+form+massachusetts'. The ML classifier strongly indicated maliciousness, and the presence of numerous external links points to a SEO poisoning or link farm attack pattern. No scripts were extracted, but the PDF structure itself is used for the malicious redirection.

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.ru/pify?keyword=voluntary+acknowledgment+of+parentage+form+massachusetts
    • http://files.rubysgift.net/uploads/1/3/2/3/132302888/garakirexaroben_samepepukibid.pdf
    • http://mowad.ownastandardbred.com/uploads/1/3/1/3/131380213/jukunegoja.pdf
    • http://files.algerparkchurch.org/uploads/1/3/2/6/132681749/ee504ebcf4cfa.pdf
    • http://rikizabe.twobucksandadoe.com/uploads/1/3/1/4/131438563/dudusorowabomefokupo.pdf
    • http://files.boatnik.com/uploads/1/3/2/6/132681826/xovobariw_reboxijasije_gobulozikariji.pdf
    • https://cdn.shopify.com/s/files/1/0428/3462/4679/files/80040738478.pdf
    • https://cdn.shopify.com/s/files/1/0448/5795/0370/files/hereditary_hemolytic_anemia.pdf
    • https://cdn.shopify.com/s/files/1/0435/4772/1882/files/12285837617.pdf
    • https://cdn.shopify.com/s/files/1/0431/5247/4280/files/45409736146.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/46099733318.pdf
    • https://cdn.shopify.com/s/files/1/0434/5469/3541/files/algebra_equations_test.pdf
    • https://cdn.shopify.com/s/files/1/0432/2285/9944/files/best_application_for_reader_ipad.pdf
    • https://cdn.shopify.com/s/files/1/0432/4609/2443/files/tavatonaripox.pdf
    • https://cdn.shopify.com/s/files/1/0429/1634/8057/files/xanagezekijiwakuwobif.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_off000068dd.bin
af5bca4044efc963df0d1b32c128abbd3e2d0a30356fc092799aa6cd7a5cb3f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68DD 5792 bytes
font_01_sfnt_off00007c92.bin
002f67f538e888e18f5cbdefd0fc027c6ea309245b2add45665a6ddcf249f28f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C92 10372 bytes

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