Malicious PDF — malware analysis report

Static analysis result for SHA-256 504e2b4a90f3cf1c…

MALICIOUS

PDF

46.3 KB Created: 2020-08-18 17:07:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2bfd8d9b8e9a967b1274530c00f753de SHA-1: 6b5c2593231837b230cad8ade218fba0bdf11b75 SHA-256: 504e2b4a90f3cf1c816523f26418ee526d2988d98a2b575c920a0e91b6ebab0e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged as malicious due to a high number of embedded links, many of which point to a redirector service. The ML classifier also strongly indicated maliciousness. The document body contains a URL that appears to be part of a link farm, likely designed to improve search engine ranking for malicious content or to distribute malware. 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.com/pify?keyword=can%2527+t+stop+us+song In PDF document text
    • http://gekim.doctorbewell.com/uploads/1/3/1/4/131453674/wabivibotakitom-zagitagosagixi.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/1/0436/0624/5539/files/nemunemovonasuvomiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/2871/4396/files/email_template_zoho_creator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1653/4690/files/dajumagiboliwapowirobekuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0143/0695/files/18446403813.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1267/0111/files/rockwood_pop_up_camper_parts_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2879/0946/files/operational_amplifier_circuits_theory_and_applications.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6085/3912/files/bitibododujawurevanurivas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9824/7069/files/neuralgia_del_nervio_ciatico_tratamiento.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0206/1215/files/dynamic_stretching_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1804/4063/files/77606140484.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6424/5925/files/approaches_to_educational_research.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/2844/3299/files/newmar_owners_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8064/6807/files/17264297009.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5895/3381/files/fixuvozufoboru.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 1

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_off00007990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7990 4800 bytes
SHA-256: d4f3b3326409b609ccf9cfcaf3a73987e2e728fe87c87bfb5753184fbf4289d5
font_01_sfnt_off00008a02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A02 10128 bytes
SHA-256: 73c6a9f536eea50e84cfd0c3c2d8d7054f16f2b514169fcaa50e7e189ab86460

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