Malicious PDF — malware analysis report

Static analysis result for SHA-256 11f4a9be5ba187b9…

MALICIOUS

PDF

44.0 KB Created: 2020-08-18 16:57:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60402f48a28121c96752abab79d3f9e7 SHA-1: b52d7b608565968f24c43c2b4d7ff3061af23bdd SHA-256: 11f4a9be5ba187b9f72ea75f6ecd2c33f6bfc68f6764476130a33476aaf45c7c
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body also contains a call-to-action phrase, suggesting a lure to click the embedded malicious link. The presence of numerous external PDF links further indicates a link farm or redirection scheme designed to obscure the final malicious destination.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=capacity+management+document+template
    • http://files.aulternatives.com/uploads/1/3/0/8/130873893/pirulazorewura_jugowizema_waxib_domeviwerub.pdf
    • http://midelolor.floorexpertslimited.co.uk/uploads/1/3/0/7/130775971/rowakanaratadujuzak.pdf
    • http://kotix.overtimefitness.com/uploads/1/3/1/4/131438448/xurajapowokurukifo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/2530/0647/files/72445653699.pdf
    • https://cdn.shopify.com/s/files/1/0429/2640/7843/files/atal_pension_yojana_form.pdf
    • https://cdn.shopify.com/s/files/1/0435/1823/0688/files/14717132539.pdf
    • https://cdn.shopify.com/s/files/1/0432/7338/8190/files/76676351347.pdf
    • https://cdn.shopify.com/s/files/1/0434/0485/3406/files/monefigisibusuzabagoduw.pdf
    • https://cdn.shopify.com/s/files/1/0433/7106/9594/files/pomibelepatazuw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/91960476686.pdf
    • https://cdn.shopify.com/s/files/1/0428/8207/2732/files/xerefukovinifibut.pdf
    • https://cdn.shopify.com/s/files/1/0433/5098/2821/files/60139464330.pdf
    • https://cdn.shopify.com/s/files/1/0432/8397/2256/files/44022908722.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fb9.bin
f9e37884cbc0d288331d3b51e9a6c9d91deb96b920d3ddc0f6224a21ca73fcc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB9 5124 bytes
font_01_sfnt_off00007117.bin
4f1aceb895f0bd5fdb5d6ecf05203262df0f4408131e7befbe26b9b74551dddb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7117 10528 bytes
font_02_sfnt_off0000950a.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x950A 4324 bytes

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