Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b337affc0c7629f…

MALICIOUS

PDF

34.7 KB Created: 2020-08-07 12:53:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 19f7388051e4197115c0dfc016cc8ad6 SHA-1: 70c3214efea485a7b94d6188413f659ee0582bef SHA-256: 6b337affc0c7629f1bedbcf67cbf95d70a488b3cb615f3185c35f7d2784fe7e3
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains embedded links that redirect to a malicious URL, disguised as a service manual. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate that the document is part of a link farm designed to redirect users to malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of malicious redirector links suggests a phishing or malware distribution attempt.

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/wb?keyword=bose%20companion%205%20service%20manual In PDF document text
    • http://files.majesticacademy.net/uploads/1/3/2/6/132696067/1994516.pdfIn PDF document text
    • http://files.redwoodvisualarts.org/uploads/1/3/0/7/130738859/purewuladaw.pdfIn PDF document text
    • http://files.splitfingerstudio.com/uploads/1/3/0/8/130874543/e6d08e261.pdfIn PDF document text
    • http://files.jagst.org/uploads/1/3/1/1/131164534/98fda5cf45fcd8.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/1/0429/2981/5705/files/cultivo_de_bacterias_en_agar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5038/5051/files/74064694873.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5090/7286/files/21195041951.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2587/2549/files/kubivelopugo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nipexaledova.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4489/6925/files/9472218304.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0727/0297/files/36003607380.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6088/7705/files/87071560336.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5562/1031/files/25183127462.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0645/2127/files/68024040724.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 5

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_off00004781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4781 5312 bytes
SHA-256: 4a9c38019221f6f560a6485461c8540f0e58c4771821d66b7efd3b8024961388
font_01_sfnt_off00005986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5986 11020 bytes
SHA-256: d3b61e50433ee3a9857806199e0af0abcc5d0ea9fe210e310b48ce42d8515ead

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