Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3136d3f5e3c7750…

MALICIOUS

PDF

50.6 KB Created: 2020-08-06 05:15:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ce5a5a98fbb48846a4af6a3a27637298 SHA-1: e212713f0581491ebd79234195660051ea567d7e SHA-256: f3136d3f5e3c7750509a33c2eb977fad5a6ebeba71af59ac6fdc42cc91c0f4a6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains a URL that appears to be part of a lure for free downloads, likely leading to malware. The ML classifier strongly indicates maliciousness.

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=classic+cars+uk+may+2020+pdf In PDF document text
    • http://files.trishatakestravel.com/uploads/1/3/1/3/131383478/5993549.pdfIn PDF document text
    • http://files.whitepeacockcoffee.com/uploads/1/3/1/4/131436971/7dad80.pdfIn PDF document text
    • http://files.whirlingwindsstables.com/uploads/1/3/0/7/130738778/posasojidapajalikala.pdfIn PDF document text
    • http://files.purplepotters.com/uploads/1/3/0/7/130739699/fopuni-wulol-sezabuwerefuwo.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/1/0437/8466/7287/files/63005976259.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0760/4896/files/vixefopujive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3587/5749/files/alter_ego_4_b2_guide_pdagogique.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1854/2504/files/ridafugiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9915/1768/files/33565975919.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6871/1321/files/degajaposuxawopoli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2324/4191/files/59916878704.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5129/4628/files/intel_core_i5_6600k.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8035/1897/files/zewel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8001/5262/files/nobomitupojofa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7699/3702/files/calum_von_moger_ebook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5327/5546/files/kofazudel.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 8

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_off000080dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80DD 5648 bytes
SHA-256: 897a4bba6062a0b9436c3b26e7c4b46581f0abb621506b2d004fcdb7e0a4a089
font_01_sfnt_off00009405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9405 12936 bytes
SHA-256: 0b75bfe650e3ed40fe7b15dcce90f171c1f6f7a65fc3870f4f3d361ef80a45f8

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