Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bac4bbc5d2f6375…

MALICIOUS

PDF

55.5 KB Created: 2020-07-31 04:17:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 455e58c76ce5a5a867fe22d4a639e3c7 SHA-1: 9204a5f0c037c6913466560c5706b65c91245f88 SHA-256: 6bac4bbc5d2f6375318ec7b75920ff982b9d6f9150bd825ea25de0d59fee44d3
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it was generated programmatically. The primary attack vector appears to be directing users to malicious infrastructure via embedded links, likely for phishing or malware delivery.

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=corynebacterium+diphtheriae+pdf In PDF document text
    • http://files.toniaindigohughes.com/uploads/1/3/1/3/131380342/negitonomovevuv-vexizi-vejamovixek.pdfIn PDF document text
    • http://files.thepatchworkunderground.com/uploads/1/3/1/8/131857305/kizevagiluvifolema.pdfIn PDF document text
    • http://files.tbabcockhoney.com/uploads/1/3/1/1/131164063/3872413.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/1/0435/8527/4024/files/vakawibefavojifobemupasoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46676539889.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4556/0226/files/nubeterigib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5797/0329/files/bowipubapibunetiluf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2429/3796/files/49938222409.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2767/7852/files/81581124885.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3077/2901/files/63029240029.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0953/2316/files/niwawosokunavevori.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1049/7434/files/varupikedutefu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1657/6424/files/nulerotibef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0102/6459/files/fupabapigalorivezejawivid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9353/9478/files/lobumodutamilifisabuzux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1575/7214/files/gipatekajamixebapuwonap.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 5

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_off00009b8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B8C 5332 bytes
SHA-256: 415c3daf75ef9a481e3fef477f9fa3762200e45a6edb98e60482d98793a0be78
font_01_sfnt_off0000ad80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD80 10412 bytes
SHA-256: cd3c70ca7cfa34aac4ead9c3c210b176ff3e9537c4bcf2b8df2413dfc959c05a

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