Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aa8f6c83dc85c1b…

MALICIOUS

PDF

100.1 KB Created: 2020-08-12 09:56:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9ae7d63e890991679c94901934fda105 SHA-1: 4f0dd7ccf0a3702fff64a0658be05a75eeef54a5 SHA-256: 9aa8f6c83dc85c1b713dca5d3692fb82e76a7b9abe8f201c23ea39f58cf8ad26
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which are likely SEO-driven. The ML classifier also strongly flagged this PDF as malicious. The presence of a malicious redirector suggests the document is designed to lead users to harmful content or further exploitation.

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 lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=anorexia+nervosa+causes+pdf In PDF document text
    • http://keger.sojofireproject.org/uploads/1/3/0/7/130739777/446072.pdfIn PDF document text
    • http://files.gogginslonestarfarms.com/uploads/1/3/0/9/130969428/712bb2d947d352.pdfIn PDF document text
    • http://files.internallyflawlex.net/uploads/1/3/0/7/130775646/kozokenonedanofimar.pdfIn PDF document text
    • http://files.berlinartclass.com/uploads/1/3/1/4/131453684/7741492.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8783/7849/files/solution_book_of_thomas_calculus_12th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6569/5638/files/pamexamifudojuwag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9309/8660/files/vuduposodadipe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4864/0418/files/pagevobegorezezaliboxege.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0191/3244/files/93632178714.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6934/0822/files/gibozukejiwezivi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2269/7126/files/juremogukawotokibatigedez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1374/1471/files/tewuboropoxisurokaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6604/7129/files/salaxagoze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9395/8560/files/canciones_acordes_para_guitarra.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8045/8144/files/riwowememitu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4895/9142/files/hbr_guide_to_better_business_writing_free.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000143a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143A4 5232 bytes
SHA-256: 39e1b71a003b6370f929e2a9aa716a394ba48b7489735d0f5a9d081daab257a7
font_01_sfnt_off00015585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15585 14428 bytes
SHA-256: b1f13b516e0ed53e953ba526d1c0bd910fcc4f0a1086f9b4fc7c49c3bafd29f2

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