Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bbf7fd44b90436e…

MALICIOUS

PDF

49.9 KB Created: 2020-08-08 15:08:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 888f72805d24fd57a0418b8114bf0e81 SHA-1: 69b7e59908dedacf2e895e03cabcd850dd8e91b1 SHA-256: 5bbf7fd44b90436e5f1d43e1c611d36cb94fc26ae5dd5411309ed9d73e24f25b
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document functions as a phishing lure, presenting itself as an image-based document to conceal a clickable link. The primary link directs to a known malicious redirector infrastructure at 'https://ttraff.com/wb?keyword=table%20value%20of%20chi%20square%20pdf', which likely leads to further malicious content or malware. The document also contains a large number of external PDF links, suggesting a link farm or SEO manipulation tactic.

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.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 49 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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/wb?keyword=table%20value%20of%20chi%20square%20pdf
    • http://files.dustinedwards.org/uploads/1/3/0/7/130776590/kizajojof-naxoturuz-jidozunax.pdf
    • http://files.scswat.com/uploads/1/3/1/3/131380547/0cd707.pdf
    • http://movuna.yamilkanoa.com/uploads/1/3/1/3/131398591/afb94b970cdea1.pdf
    • http://files.lorenasantacruz.com/uploads/1/3/1/6/131637178/zafaridavajanudilana.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6564/7002/files/93094227285.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52244446143.pdf
    • https://cdn.shopify.com/s/files/1/0439/5171/8558/files/doxubezo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4387/2150/files/37544457945.pdf
    • https://cdn.shopify.com/s/files/1/0431/6997/2383/files/jegemefixetigulamumad.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tozonolemudafolafoxi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7677/9174/files/libro_para_aprender_a_tocar_guitarra_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0434/6127/9896/files/93100259621.pdf
    • https://cdn.shopify.com/s/files/1/0431/7426/4993/files/historia_de_la_tabla_periodica_linea_del_tiempo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5180/9957/files/donuvuduxivefateniduru.pdf
    • https://cdn.shopify.com/s/files/1/0434/5305/5128/files/swka_angielskie_poziom_b2.pdf
    • https://cdn.shopify.com/s/files/1/0430/9906/2421/files/64463883903.pdf
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/12852598682.pdf
    • https://cdn.shopify.com/s/files/1/0432/0477/2000/files/fivesinapafepenojozas.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_off00008aae.bin
be363f808b8521938a0b0a5e476ff7eb234d0ebfc9174ace004d7c4cb181816d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AAE 5520 bytes
font_01_sfnt_off00009d69.bin
f6f5a57a5db8b5804f7b0ab1e740c0d420948587aeccebe4133041360a1294cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D69 8228 bytes

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