Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6dc99ee7d3a0c46…

MALICIOUS

PDF

78.0 KB Created: 2020-08-06 18:42:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0233032ef678649708882b458f5dc7e4 SHA-1: 6c6192a6f498afd33ff40066c52e53d1fb7877fb SHA-256: c6dc99ee7d3a0c4638472058d4b8b800d807a26e6fee47b3eb010de4b0358671
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body text, though partially corrupted, suggests a lure related to a 'biogas plant visit report'. The ML classifier strongly flagged this PDF as malicious. The primary malicious IOC is the redirector URL.

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/wb?keyword=biogas%20plant%20visit%20report%20pdf In PDF document text
    • http://files.kurtmorris.net/uploads/1/3/0/9/130969352/natodesafoji.pdfIn PDF document text
    • http://files.justmytour.com/uploads/1/3/0/9/130969974/8955763.pdfIn PDF document text
    • http://files.dennisplott.com/uploads/1/3/1/4/131453365/worozuj.pdfIn PDF document text
    • http://files.tangicolombel.com/uploads/1/3/0/7/130738978/notesuzu-nezovejani-rigodojenoloxik.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/1/0429/8221/1735/files/boradiku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3848/2332/files/46090480020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8368/5274/files/fizirifizowuvizafu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5476/8021/files/sowale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0844/8919/files/vexatiwiku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5004/8420/files/31350483499.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3282/1412/files/accelerated_learning_for_expertise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2074/6906/files/julobefus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3770/4867/files/dolumavafezox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0086/3643/files/99872774462.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: acomputerconsultant.com 5 samples

Related samples 4

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_off0000ea4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4B 5316 bytes
SHA-256: 3b39b61b2349b163413bbba082df52378d14170224fae9695b44d919131fb9bc
font_01_sfnt_off0000fc80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC80 15272 bytes
SHA-256: 754f324649385356751c41e32f578e2b8535ed22b9f2fbbf16f01e3f9fb40aee

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