Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f2f3b9f41dd838e…

MALICIOUS

PDF

58.0 KB Created: 2020-08-28 14:45:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8754b917fdbb5be41e7145073c6059a4 SHA-1: b41460469b6ea54e3f7da8efd26e808213d020d4 SHA-256: 5f2f3b9f41dd838e2d44c160cdeb6027e33eda94e41222748988238b46c80a70
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains a URL that matches the redirector found in the heuristics. The presence of a link farm and a malicious redirector strongly suggests an attempt to lead users to malicious content or phishing pages.

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=sistema+de+capta%25C3%25A7%25C3%25A3o+de+%25C3%25A1gua+superficial In PDF document text
    • http://bafaxip.nehassaiu.com/uploads/1/3/0/7/130775971/jefal.pdfIn PDF document text
    • http://files.mora.org/uploads/1/3/1/4/131483307/dc0353ff7608b7b.pdfIn PDF document text
    • http://ximadarof.vargassuarezuniversal.com/uploads/1/3/1/4/131453134/guziwivatofi-rixufexuzupilet-fozapekujezikin-retolobewabe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3227/9190/files/ayurvedam_telugu_books_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4434/7799/files/bexinegi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0002/1667/files/65111998518.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0745/1042/files/25860811276.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9229/6359/files/1976_kawasaki_kz900.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3492/6495/files/44125957319.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9037/0975/files/viwovopa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4998/3905/files/82053680045.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3459/0878/files/nigalepazasesiziravonu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/4853/3917/files/guidelines_peritoneal_dialysis_infection.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/9794/9087/files/jibusilejiboluwajogu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9301 6088 bytes
SHA-256: 519d3271dd944c0368e765322fdefba9e7a72bb0b7bf2ae6787e97d468a44cf2
font_01_sfnt_off0000a63c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA63C 12224 bytes
SHA-256: 6f2c9e5c97c88f2419b64cfb58d136d6ff9e821a3ff4c876fc9e08e671f99e61
font_02_sfnt_off0000cacb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCACB 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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