Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f7bc1c5c0b94891…

MALICIOUS

PDF

42.2 KB Created: 2020-08-20 18:12:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1eb125f8482ba3ea1044bac13445c5e1 SHA-1: b9e3c4cee06ba0f6503960c4a30be233d40f9c90 SHA-256: 5f7bc1c5c0b948915458446b1226f4ef3aa8e0bb9a94e648b4734388f53dd0e3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a malicious redirector link disguised as a utility to 'allow copy pdf online'. This link, 'https://ttraff.com/pify?keyword=allow+copy+pdf+online', is designed to lead users to further malicious content. The document also hosts a large number of other PDF links, likely for SEO manipulation or to distribute additional payloads, indicating a link farm attack pattern. No scripts were extracted, but the presence of embedded URLs and the heuristic firings strongly suggest a phishing or redirection attempt.

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.com/pify?keyword=allow+copy+pdf+online
    • http://xodaked.robinvalentinephoto.com/uploads/1/3/2/7/132740214/bb743.pdf
    • http://files.sabrinamichellehomes.com/uploads/1/3/2/6/132682681/6233173.pdf
    • http://wufigudu.wildwoodsprings.org/uploads/1/3/2/6/132681951/decc22294.pdf
    • http://files.foothillschristianlifecenter.com/uploads/1/3/1/4/131409200/fa3a6.pdf
    • http://files.worldconnect.apg-ga.com/uploads/1/3/2/8/132815359/tevazurigejevawalizu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/6644/2406/files/42605430486.pdf
    • https://cdn.shopify.com/s/files/1/0433/8640/5022/files/widusapa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/dosefodijib.pdf
    • https://cdn.shopify.com/s/files/1/0431/7996/6628/files/xojudanobafubadojerifegok.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/nixefesosejunix.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/xitix.pdf
    • https://cdn.shopify.com/s/files/1/0430/6999/7217/files/somisowipulutinuxop.pdf
    • https://cdn.shopify.com/s/files/1/0431/8740/4968/files/discord_nitro_boosting.pdf
    • https://cdn.shopify.com/s/files/1/0447/2481/3977/files/8692014345.pdf
    • https://cdn.shopify.com/s/files/1/0430/8339/9329/files/4564643774.pdf
    • https://cdn.shopify.com/s/files/1/0432/6624/4764/files/human_activities_and_their_effects_on_the_environment.pdf
    • https://cdn.shopify.com/s/files/1/0432/3429/5966/files/93947315373.pdf
    • https://cdn.shopify.com/s/files/1/0431/6626/9600/files/39635564139.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006740.bin
beac37e0ac2446efcdad8db84efdb31383049a9b9fccec653aca290045e19822		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6740 4848 bytes
font_01_sfnt_off000077ea.bin
9d8fea6ea5993259be4651b46826ba1642b4aa78e2b09a0fa2d0648de0caf03d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77EA 10564 bytes

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