Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b649efc6a55ac7e…

MALICIOUS

PDF

37.3 KB Created: 2020-08-25 20:13:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e4d93b5add513fb34fa6ffd6faf3aebe SHA-1: 29242424f173b9aa39ca41425ce321a95f5c8342 SHA-256: 3b649efc6a55ac7e1fc985950e2cb7ac9e8dbd121fb38513a7d800d4769c87e1
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=cycle+de+rankine+exercice+corrig%2525C3%2525A9+pdf'. This URL is likely part of a phishing or malware distribution chain. The document also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on cdn.shopify.com, suggesting an attempt to game search engine results or distribute content broadly. The ML classifier strongly flagged this PDF as malicious.

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=cycle+de+rankine+exercice+corrig%2525C3%2525A9+pdf In PDF document text
    • http://files.alphachiomegaofoaklandcounty.org/uploads/1/3/0/9/130969310/5fc5202f62.pdfIn PDF document text
    • http://fomal.cleanwaterforlavallee.org/uploads/1/3/1/1/131164250/0882d.pdfIn PDF document text
    • http://nixiduse.bearbugmedia.com/uploads/1/3/1/6/131636725/417012.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/1/0434/1612/5590/files/mixobega.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0632/7959/files/neoplasia_mcq.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5503/7078/files/marketing_textbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6677/8009/files/68481643642.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8734/7360/files/futipovololezadijudapuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4578/1658/files/xamixesebimidudaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8092/2789/files/speedfit_manual_treadmill.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6911/1449/files/31140841498.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5318/5174/files/wavanex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3337/0529/files/wumuzekekizilegi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2766/0951/files/argumentative_writing_example.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 1

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_off0000527a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x527A 5424 bytes
SHA-256: 199c681c0ba8eb65847539f88155784e6aeae11ed10f9c6ea81b4f5ffa1e9c56
font_01_sfnt_off000064c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64C1 9800 bytes
SHA-256: 389cb539ed7f16d57e8f7d7e259195611c68abfcdd3664830061c498cdbb01a1

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