Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f252fd560c021fa…

MALICIOUS

PDF

39.8 KB Created: 2020-08-23 07:21:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7269eb846da140d3ef53d687b74881e7 SHA-1: 53937cd8da3ae7f5c70390ea6b67570b245fb34e SHA-256: 3f252fd560c021faa3dd36d6bacbb3b7d164c4eb2441c8e4ae8376d7563a2926
202 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of external links, suggesting a link farm or SEO poisoning attempt. The document body contains a call-to-action phrase, reinforcing the lure. The primary IOC is the malicious redirector URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=carbon+footprint+printable+worksheet In PDF document text
    • http://files.leedsbarber.co.uk/uploads/1/3/1/4/131438137/f50018.pdfIn PDF document text
    • http://files.49centbanana.com/uploads/1/3/1/3/131398452/3756740.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/1/0430/7730/4484/files/39336815964.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2607/1199/files/9243680145.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2543/8619/files/renewable_energy_textbooks.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1705/0008/files/gakuvoro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/78097835602.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6823/5682/files/andaman_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8493/7384/files/katagoket.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7118/4794/files/29485533085.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5525/9546/files/tiwulima.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2232/5672/files/unit_auxiliary_transformer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1471/6572/files/arsenico_en_agua.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_off00005a2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A2F 5188 bytes
SHA-256: 18c0e67944c949184483d44373b8cac234630b3d73097a910c15cf06760e810f
font_01_sfnt_off00006bde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BDE 11532 bytes
SHA-256: f3e893c7311bd87476c8a9505c632325ea5ed06be36061dba5e8177d4bc45864

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