Malicious PDF — malware analysis report

Static analysis result for SHA-256 842e65d8e96ad970…

MALICIOUS

PDF

42.4 KB Created: 2020-08-08 00:43:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4afca56350125945ef35984b26bd69f SHA-1: 729665793059edb1a0220e24c53b4f1e89ed91d0 SHA-256: 842e65d8e96ad970071f784f79996488b14d39650ce303a1143095016d83eb55
174 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to benign Shopify domains, but one critical link redirects to a known malicious domain, ttraff.ru. The ML classifier also flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure, potentially for phishing or to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.ru/pify?keyword=acute+infection+and+myocardial+infarction+pdf
    • http://files.dunphyshandguntraining.com/uploads/1/3/2/6/132681566/d354c601d.pdf
    • http://kijilome.preparetoperform.net/uploads/1/3/1/3/131379578/dd03c28ab4791.pdf
    • http://madowoka.haveheartwellness.com/uploads/1/3/1/8/131856158/6182578.pdf
    • http://files.srobinsonphoto.com/uploads/1/3/2/7/132712514/zadexavafumodajuditu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/1896/7450/files/directional_selection_graph.pdf
    • https://cdn.shopify.com/s/files/1/0438/2624/9885/files/38539840580.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6725/files/13260044066.pdf
    • https://cdn.shopify.com/s/files/1/0436/1843/5229/files/eclectic_paradigm.pdf
    • https://cdn.shopify.com/s/files/1/0433/8722/4214/files/15990742949.pdf
    • https://cdn.shopify.com/s/files/1/0428/6958/8124/files/22892397609.pdf
    • https://cdn.shopify.com/s/files/1/0432/0867/1394/files/46525839135.pdf
    • https://cdn.shopify.com/s/files/1/0432/2351/5300/files/arabic_words_meaning_in_urdu_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/3837/5074/files/23866220272.pdf
    • https://cdn.shopify.com/s/files/1/0438/3725/9936/files/zatagowavad.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tokavurovapipemekimisam.pdf
    • https://cdn.shopify.com/s/files/1/0431/2632/5402/files/14163402142.pdf
    • https://cdn.shopify.com/s/files/1/0435/9946/2558/files/assurance_automobile_au_cameroun.pdf
    • https://cdn.shopify.com/s/files/1/0431/0863/0681/files/67197618860.pdf
    • https://cdn.shopify.com/s/files/1/0431/7675/5349/files/gazivufawoxiwudesiluzu.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_off00006624.bin
c243a1df9a566bd5c7a9280d2d3fbbb44d09dd0a304f06b43334d8f128b36644		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6624 5212 bytes
font_01_sfnt_off000077db.bin
65c09c76c5239f757f2b4b219990510fe40e8f4bc89bcd97792d759208baf229		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77DB 10628 bytes

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