Malicious PDF — malware analysis report

Static analysis result for SHA-256 859a0c0c1002d247…

MALICIOUS

PDF

35.8 KB Created: 2020-08-11 16:22:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 476a09ad627c53ab161319b45afcea7c SHA-1: a987406dadcb56522177d2d7cdb43713614617f2 SHA-256: 859a0c0c1002d247fc1d91012cf059dd94fef05430f81e73d322beb498593c26
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with a critical heuristic firing indicating it redirects to known malicious infrastructure. The document body and heuristics suggest a lure for free downloads, leading to a phishing or malware distribution site. The ML classifier strongly supports the malicious verdict.

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=diagnostic+interview+for+personality+disorders+pdf In PDF document text
    • http://files.plainfieldspanish.com/uploads/1/3/1/1/131163943/desemaxare-binid.pdfIn PDF document text
    • http://files.siderseffect.com/uploads/1/3/1/0/131070351/89067bc.pdfIn PDF document text
    • http://files.greenwaymetalrecycling.com/uploads/1/3/1/3/131383204/pinasogi.pdfIn PDF document text
    • http://files.parttimenightjob.com/uploads/1/3/2/6/132695531/zifanixe_xawaxetijulonu.pdfIn PDF document text
    • http://wijuti.ottawaprayercenter.org/uploads/1/3/2/8/132814930/vufedalo.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/1/0434/1615/8359/files/afrofuturism_2._0.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8027/8426/files/2006_chevy_trailblazer_repair_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6644/2406/files/crash_team_racing_ps2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2050/9596/files/mugen_1._0_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2518/4421/files/61849559499.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3966/1981/files/31541476183.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2929/1427/files/rukumilevezovotewiwofe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3741/7891/files/advanced_uav_aerodynamics_flight_stability_and_control.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6219/7400/files/xikamubilegafiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7156/1116/files/52171857830.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0292/0086/files/puwebozurafu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5140/8799/files/fixapininijeno.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 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_off00004d5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D5D 5576 bytes
SHA-256: 322bd7195f50e591ece2adc4c2ec28e724ef840a2b2a989a8f3a8b0d0c74788a
font_01_sfnt_off0000607b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x607B 9764 bytes
SHA-256: 2875029f8b7fe452a037101b17d6fc4106728f1d0d9fea7361b942011771e3f5

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