Malicious PDF — malware analysis report

Static analysis result for SHA-256 40dc0f0b9942290b…

MALICIOUS

PDF

42.3 KB Created: 2020-08-05 03:55:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0798c716ce3d3b665bf0d2e04fb9c7cf SHA-1: 2c298a000ef3b709f1b6d76716af518e80b4b3a0 SHA-256: 40dc0f0b9942290b9ccffb7a168812c883100aa6d2a01701a37dd6c46fb61339
194 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to a redirector service (ttraff.ru) that is known to host malicious content. The document body itself is largely unreadable binary data, but the presence of the redirector and the sheer volume of links suggest a link farm or redirection attack. The ML classifier also strongly indicated maliciousness. No scripts were extracted from this sample.

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=bocconia+arborea+pdf In PDF document text
    • http://files.plant-miner.com/uploads/1/3/2/7/132711975/4348608.pdfIn PDF document text
    • http://files.carolinapumpworks.com/uploads/1/3/1/4/131437983/razowiwajugova.pdfIn PDF document text
    • http://files.justiceamick.com/uploads/1/3/1/4/131453146/4658394.pdfIn PDF document text
    • http://files.bitsnpieces.ca/uploads/1/3/1/6/131606493/1988115.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/1/0427/9762/9596/files/popuvujurun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0763/7661/files/zexuxor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8942/0695/files/roboz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6854/5441/files/nexozovapexewi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6057/5912/files/19622903796.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4421/6727/files/instagram_password_finder.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4190/7110/files/85558510245.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7468/0987/files/fikafasasub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0714/8185/files/4379498304.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7118/4794/files/sotugotakirirafusa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7468/0987/files/89456690177.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7279/0421/files/mekekamaguwidopuvakanize.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
🗂 Part of campaign: bitsnpieces.ca 5 samples

Related samples 8

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Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6426 5128 bytes
SHA-256: bca3210dcd3bc8393732f72cf582d4f141d949d5b960a413976a881bd5858017
font_01_sfnt_off000075a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75A2 13756 bytes
SHA-256: ff6ed2744e7ce20a9fe816cb8a28d4c7a16c2973b794feffe42e44e9272dafac

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