Malicious PDF — malware analysis report

Static analysis result for SHA-256 76a79e9d53ddcdfc…

MALICIOUS

PDF

57.6 KB Created: 2020-08-08 15:45:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3ecf7618c2e548f9f194aeb00d215b35 SHA-1: 69e1afda5e3cc7d9a862f053cda4055ce492e432 SHA-256: 76a79e9d53ddcdfc50681e4ad81afd8742366a27b0bdb133af4e7107f97d3d9d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, with a primary URL pointing to a known malicious redirector. The ML classifier also strongly flagged this PDF. The document body, though heavily obfuscated, contains the malicious URL, suggesting an attempt to disguise the true nature of the link.

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.com/pify?keyword=basarab+nicolescu+pdf In PDF document text
    • http://saroxuno.well-healed.com/uploads/1/3/2/6/132696212/5548582.pdfIn PDF document text
    • http://files.increaseus.com/uploads/1/3/0/7/130774970/wesusesugare.pdfIn PDF document text
    • http://files.besttestboosters.com/uploads/1/3/1/6/131606289/lilaxi_misoj_womodamuraw_nabix.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/1/0435/1649/3976/files/28396951303.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2048/3751/files/20460910017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8733/0464/files/45341908004.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9634/2695/files/pipewisukuguturivusefip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9867/5102/files/astrophysical_jets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5144/9496/files/gosetunanivonilaju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1358/6596/files/valivejopovoxojogamefu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4495/4527/files/rowebukepepidaxoxujapu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3477/1610/files/55066422387.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5309/5844/files/fusalonekan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7692/7134/files/saxawefadunineva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1080/9256/files/nujigevutolinad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8596/2142/files/chiang_mai_old_city_map.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_off0000a277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA277 5336 bytes
SHA-256: 1ddfaf503afefd4b1a5fb0c0cb02ab95a5fcfa62468637432b4c9e33903807dd
font_01_sfnt_off0000b4a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4A7 10996 bytes
SHA-256: 73b7f719132f5b8dcf79d22e01d5b526a8c787d54d12785df5403f3ca96141cf

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