Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6665f88a98d02e0…

MALICIOUS

PDF

59.3 KB Created: 2020-07-29 21:38:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cbbeda2b4339dc93927f73609bdb22a6 SHA-1: 6beff2d16e3f91cb427c462d901b4488e29d6617 SHA-256: c6665f88a98d02e09e2c46f808a21ea79f47ead87788dfef37b00b7a3e0aa6ca
194 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The primary malicious IOC is the redirector URL, which is designed to lead users to further malicious content. The document body appears to be malformed or obfuscated, preventing a more detailed analysis of its specific lure.

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.cc/pify?keyword=antenatal+care+pdf+file In PDF document text
    • http://files.jbpaoletti.com/uploads/1/3/1/6/131606951/60ca533.pdfIn PDF document text
    • http://files.brandedoutdoorclothing.co.uk/uploads/1/3/1/4/131453288/a02663.pdfIn PDF document text
    • http://files.garminmalta.com/uploads/1/3/0/7/130775817/9270522.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/1/0433/0681/1560/files/43925925001.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5440/7578/files/madofe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5150/7112/files/ruwejifebajelopolote.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3929/2577/files/25013372969.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1278/4277/files/zasadubedupebika.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9065/6936/files/14934000385.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/naron.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5802/6903/files/susimeninimevekaxikaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9785/8972/files/45758899906.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5966/7363/files/sedip.pdfIn PDF document text
    • http://www.who.int/reproductiIn 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 2

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_off00009fc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FC2 4640 bytes
SHA-256: c6e2f954ad3437aa769a372259793d61178e63dfe618dfd06e352a0bcfebeacc
font_01_sfnt_off0000af88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF88 15756 bytes
SHA-256: 50529e4ca4691578d0af41ea2df78ca4bf01e00a2d9acef7492762277f976f8a

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