Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b9af9807cd7018b…

MALICIOUS

PDF

39.9 KB Created: 2020-08-20 05:57:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d98614fad2c2e37a2bf0e8ecf0ad79c4 SHA-1: 5cf5ac5c2355e1f507b487d6fafac999a9dd9e86 SHA-256: 3b9af9807cd7018b53277a916f386becf508b59f7cc60caecc15f71b0e4f14cf
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier as malicious and contains a critical heuristic indicating it links to known malicious redirector infrastructure. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many pointing to external PDF files. The primary malicious URL identified is https://ttraff.ru/pify?keyword=blank+cartesian+plane+pdf, which is likely used to redirect users to further malicious content or phishing sites.

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=blank+cartesian+plane+pdf In PDF document text
    • http://xuref.bestzest.co.uk/uploads/1/3/1/1/131164312/vikoroguwemo_dagaru_luwikixonoxeb_pilumawejuxu.pdfIn PDF document text
    • http://files.kennelgoodidea.com/uploads/1/3/0/8/130814227/7322cf5cd1e.pdfIn PDF document text
    • http://files.xcivcouture.shop/uploads/1/3/2/6/132695697/7067138.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/1/0428/6559/0438/files/dojo_for_parents.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5834/0774/files/11x17_calendar_template_word_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1189/9545/files/30460509614.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4339/6506/files/xidakubuvejaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1817/4107/files/18717022954.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6464/7077/files/45095581668.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7314/9859/files/how_to_make_a_list_in_latex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8351/4527/files/46749245560.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4257/0401/files/mco_1020._34_g.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6771/8309/files/fevupenumagonosub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2574/3521/files/69820561847.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 2

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_off00005b1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B1E 5260 bytes
SHA-256: f75c7790e1ab108f916f343628e3b2b288923fe886518a8d5618ec0b39bc94d2
font_01_sfnt_off00006d0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D0F 11684 bytes
SHA-256: eccf84112d409f94bd3a0293c77f2a5582d6fa4443c8169a2d8a8f0156a9ab9d

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