Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef88b516dd5875fd…

MALICIOUS

PDF

40.5 KB Created: 2020-08-08 08:16:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c758730260ebc671b33e5a36129cd74a SHA-1: de8ce65d1ee5ebefe89c8796e619df7cecc482df SHA-256: ef88b516dd5875fd94a513163dd7a2cd3408eff0f9242375838d35714711e856
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'two wheeler chassis dynamometer pdf'. The presence of a link farm and a critical heuristic firing for a malicious redirector strongly suggests this PDF is designed to lead users to malicious infrastructure.

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=two+wheeler+chassis+dynamometer+pdf In PDF document text
    • http://mafoxu.spencerhdesign.com/uploads/1/3/1/3/131379012/xosufememegiki-xozapul.pdfIn PDF document text
    • http://files.scharencycles.com/uploads/1/3/0/7/130776118/ginukaxezunat.pdfIn PDF document text
    • http://files.theventure.blog/uploads/1/3/1/6/131606923/2826909.pdfIn PDF document text
    • http://files.ppsvision.org/uploads/1/3/1/6/131637385/4356e912a.pdfIn PDF document text
    • http://files.champagnesparkle.com/uploads/1/3/0/8/130813696/rorubo.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/1/0428/9835/8432/files/magobusiriwolozun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0584/5397/files/genemopoxevogikuxufutofos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7945/7173/files/administracion_en_salud_publica_en_mexico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7260/0726/files/arduino_uno_r3_caracteristicas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7840/9622/files/koraruzebolupafupuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9751/3381/files/11316374919.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7505/1415/files/nukakunatanogarojuwekaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2270/5063/files/labos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/buxidumex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8847/8365/files/44950022881.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_off00006007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6007 5540 bytes
SHA-256: eabfd5fa9364ea3548b8ad1e93bdace3b446e794a8cc926b1e7943d3f914810d
font_01_sfnt_off000072c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72C6 10164 bytes
SHA-256: bd8cf5fd7bbd2f0d73825c77d0b793c6250a156afb009841fe8894cabbbcf592

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