Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8d71e06a94b3085…

MALICIOUS

PDF

72.2 KB Created: 2020-08-12 18:09:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 30617530f60f2dd0740090321a63f013 SHA-1: fe5a8b140f3a650fe4da60c896698a05f01d7a80 SHA-256: a8d71e06a94b30856625e0ced582d4e3eefe6c3d1d18df8c69eee6c51051b975
194 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and contains numerous embedded links, with at least one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Comprendre le marxisme pdf' and a URL that matches the redirector link. This suggests the PDF is likely part of a link farm or SEO manipulation scheme designed to lead users to malicious content or phishing sites.

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.cc/pify?keyword=comprendre+le+marxisme+pdf In PDF document text
    • http://files.conflictfluent.com/uploads/1/3/1/4/131406506/ponotomat_kakekerom.pdfIn PDF document text
    • http://files.gradychristie.net/uploads/1/3/0/7/130738641/9603388.pdfIn PDF document text
    • http://files.theyogaden.ca/uploads/1/3/1/4/131453496/xanizafedugifes.pdfIn PDF document text
    • http://files.ruraltrainingsolutions.com/uploads/1/3/0/7/130775009/7931110.pdfIn PDF document text
    • http://files.northcoastmineralco.com/uploads/1/3/2/6/132681740/5202307.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/1/0432/1266/9089/files/exercice_barycentre_corrig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6133/0598/files/gsa_2016_calendars.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4087/4408/files/10321723717.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3419/7666/files/90081488320.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0463/2992/files/auksinis_protas_knyga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/josuzafegeda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kupesuditijativerawepafu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8031/1203/files/melutazem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5393/0901/files/3504538693.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9930/6648/files/fojedodufanapatibax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4929/5770/files/67700334421.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 7

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_off0000d9f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F4 5160 bytes
SHA-256: a211929e434978c5091c7b55089084685a559d06b56e2280a2ebedd6a739fac6
font_01_sfnt_off0000eb61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB61 12508 bytes
SHA-256: c9605fe62daff665b6a7f757a315fd814ddc498d51a20a2849e9315180e207e5

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