Malicious PDF — malware analysis report

Static analysis result for SHA-256 101b8672b265b94d…

MALICIOUS

PDF

44.1 KB Created: 2020-08-11 23:03:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f42903b9b2a7788d7a128d8fd0b0eeb SHA-1: f5dd0eb6a708a95c0ace57a50534e43be12bb6bc SHA-256: 101b8672b265b94d41e58291b8f80432c4889890890e4ec1801a27ae1ae1b286
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which are designed to appear as legitimate resources but ultimately redirect to a known malicious domain, ttraff.cc. This indicates a phishing or scam attempt, likely using the document as a lure to drive traffic to malicious infrastructure. No scripts were extracted, but the presence of numerous links and the ML classifier's high confidence suggest a malicious intent.

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.cc/pify?keyword=ruminal+acidosis+in+cattle+pdf
    • http://files.mrsrturner.com/uploads/1/3/2/7/132712315/suruletoziritido.pdf
    • http://miwajutu.kylehughesaudio.com/uploads/1/3/2/3/132303124/xikemi_limuvaf_givememewewe_vuzijimedi.pdf
    • http://files.orleansraks.com/uploads/1/3/1/3/131383981/degifatusovibe_wakuliw.pdf
    • http://lajejik.carywoodcarving.com/uploads/1/3/1/3/131398591/xavejedebilufo.pdf
    • http://files.hsiaoaiwang.com/uploads/1/3/2/6/132682615/7248143.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/3556/4964/files/nemiji.pdf
    • https://cdn.shopify.com/s/files/1/0435/1783/7467/files/72732107855.pdf
    • https://cdn.shopify.com/s/files/1/0429/8162/1919/files/64977900516.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/63664916686.pdf
    • https://cdn.shopify.com/s/files/1/0438/2579/1138/files/what_is_dashost._exe.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/nj_transit_bus_schedule_161.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rejumaxerufu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5729/9097/files/xoriludejusejisekuditula.pdf
    • https://cdn.shopify.com/s/files/1/0428/2348/3548/files/buwurakeba.pdf
    • https://cdn.shopify.com/s/files/1/0438/7949/7896/files/foguteza.pdf
    • https://cdn.shopify.com/s/files/1/0435/1698/5508/files/71111418335.pdf
    • https://cdn.shopify.com/s/files/1/0437/2407/9254/files/git_get_latest.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_off00006ea6.bin
f839ff63deec4dddd4c8cc5ac52c2798e70f3a22f065d0ed63a508ab1e911562		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA6 5212 bytes
font_01_sfnt_off0000804d.bin
41aca829e62e34b3a5421befb34473ecd46f0e3468e43013cd326f426473f8ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x804D 10156 bytes

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