Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3b67876c9235a62…

MALICIOUS

PDF

49.3 KB Created: 2020-08-21 02:11:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c36208fa10335a79776a22a57b3328ee SHA-1: d5012872622b406f77d1e44d58dbec7c080d4b3c SHA-256: a3b67876c9235a629beca41ed3da45bcec5ae2ae3877881d06f286342291ad3c
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, indicating a link farm designed for SEO manipulation. One critical heuristic firing identified a link to a known malicious redirector infrastructure at `https://ttraff.ru/pify?keyword=ultrasound+guided+liver+abscess+drainage+procedure`. The document body, though heavily obfuscated, contains this same URL, suggesting the primary intent is to redirect the user to malicious content.

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=ultrasound+guided+liver+abscess+drainage+procedure In PDF document text
    • http://files.pearldeangarden.com/uploads/1/3/0/9/130969746/1909179.pdfIn PDF document text
    • http://tuzewijit.happenstancebordercollies.com/uploads/1/3/0/7/130739297/sabunabenefimixomol.pdfIn PDF document text
    • http://files.animalprograms.org/uploads/1/3/0/7/130776403/baxarapabafulu_xepidapivob_sofevenavomox.pdfIn PDF document text
    • http://fasajes.wolvescomputerrepair.com/uploads/1/3/1/4/131453630/1802897.pdfIn PDF document text
    • http://kokadiw.mysecretlagoon.com/uploads/1/3/1/4/131454859/ecf081bb52e6.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/1/0427/6961/2966/files/wixorigapepajasoveb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5769/3347/files/16557812189.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7415/0809/files/xexanefarabuwunaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7901/6360/files/ar_condicionado_portatil_comfee_9000_btus_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8915/8554/files/minecraft_1._7._10_resource_pack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9612/8153/files/32348859266.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8288/4006/files/finugazepuxuxulorowi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jokesinoximirupabujikupoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8531/5737/files/vuzujomovot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2174/5823/files/luturufuwa.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_off00008088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8088 5432 bytes
SHA-256: fb5c2278eb31f57bf0cf18bcf5397c1759656d9fcf63e6aa73040d07999cfc7e
font_01_sfnt_off0000930a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x930A 11432 bytes
SHA-256: 473d58f199d02e7a06278a3ce1ccd74f75b2976b41cb73bdeadb108746e9e51b

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