Malicious PDF — malware analysis report

Static analysis result for SHA-256 619333ac466dcc98…

MALICIOUS

PDF

40.4 KB Created: 2020-08-16 19:17:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8b97d98dfc2cc8120b79db156272b131 SHA-1: 76b40be92326f5a54c6824c634e69a5db96de165 SHA-256: 619333ac466dcc98c3000b5d9afcd6ff31ed276e40bbb67e24fcf164ea5ee240
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external resources, indicating a link farm or SEO spamming attempt. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. The presence of numerous links suggests an attempt to drive traffic to potentially malicious sites.

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.ru/pify?keyword=espn+usa+tv+guide In PDF document text
    • http://files.hightechtintplus.com/uploads/1/3/2/3/132302973/47aff28564.pdfIn PDF document text
    • http://files.linkesculpture.com/uploads/1/3/1/8/131856158/nekikopabe_bisop_gudoneve.pdfIn PDF document text
    • http://kepaveb.kcpuppetree.com/uploads/1/3/1/4/131453495/6937523.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7048/7702/files/munasuto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9981/6090/files/ruximilugixeludimegapode.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1758/2230/files/83665013979.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/3182/6325/files/avadhuta_gita_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6223/0181/files/definition_of_international_conflict.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7392/9378/files/losufefirosexewi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2590/8383/files/sakodekulopetukesaxir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6557/3537/files/lidodejopixazogi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2712/8735/files/41096781883.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7939/1646/files/kaluvebesaditovol.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000532a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x532A 4788 bytes
SHA-256: 0b9320782a97d9b223f525861b9b694b2d7909461b70bd3c857cb49690f9352d
font_01_sfnt_off00006384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6384 10444 bytes
SHA-256: 66af206702f5406684ee2c72469ed6c5a6e0479ce8d9069e05c6fe8457552490
font_02_sfnt_off00008737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8737 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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