Malicious PDF — malware analysis report

Static analysis result for SHA-256 965b9f9ddce419ee…

MALICIOUS

PDF

51.8 KB Created: 2020-07-31 11:02:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c8a5f2995b8b74bd7017d8dca2f249a SHA-1: caa8603d4c88e278b3f9ae712c338bd1c0ec066d SHA-256: 965b9f9ddce419eecb6c538f358359f1952e8b6c1900a50cc220c289909d1569
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many pointing to Shopify. The primary malicious URL identified is ttraff.ru, which is likely used to redirect users to a malicious destination. The ML classifier also strongly flagged this PDF as malicious.

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.ru/pify?keyword=the+anointing+of+the+holy+spirit+pdf
    • http://files.thesouthernbyrd.com/uploads/1/3/1/4/131483254/tedupamewafiki-nezepom.pdf
    • http://files.cobblestonepaintings.com/uploads/1/3/1/8/131871705/2268218.pdf
    • http://files.argos101media.com/uploads/1/3/2/6/132695578/8dfef1db582857.pdf
    • http://files.nicolefranz.com/uploads/1/3/1/3/131380870/3047437.pdf
    • http://files.careyscommunications.com/uploads/1/3/1/3/131379276/8305498.pdf
    • https://cdn.shopify.com/s/files/1/0431/0102/8503/files/80484864717.pdf
    • https://cdn.shopify.com/s/files/1/0438/5269/3669/files/rigiru.pdf
    • https://cdn.shopify.com/s/files/1/0430/6845/7122/files/23496518011.pdf
    • https://cdn.shopify.com/s/files/1/0437/3217/2965/files/43094937431.pdf
    • https://cdn.shopify.com/s/files/1/0431/7862/3138/files/jafub.pdf
    • https://cdn.shopify.com/s/files/1/0438/1619/0112/files/58898273332.pdf
    • https://cdn.shopify.com/s/files/1/0428/1883/0503/files/56708224587.pdf
    • https://cdn.shopify.com/s/files/1/0428/1673/3340/files/tupapamizumuxariwivul.pdf
    • https://cdn.shopify.com/s/files/1/0430/1671/6437/files/jibaramuf.pdf
    • https://cdn.shopify.com/s/files/1/0432/1522/4996/files/pipunoxojil.pdf
    • https://cdn.shopify.com/s/files/1/0432/8076/0990/files/98165616438.pdf
    • https://cdn.shopify.com/s/files/1/0428/0877/0726/files/bitibid.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/parisibudipaxetiwori.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/xumuzanogilevusasulolim.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_off00008d38.bin
7f879f91bff9da4520938f3eb5570aa50aeed2a8038ed527ab0ba12cf77acd04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D38 5144 bytes
font_01_sfnt_off00009eb7.bin
117a550686f391fee4b67da8c19e39499fe04b3664255f0ae8cd20d75bd86559		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EB7 10332 bytes

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