Malicious PDF — malware analysis report

Static analysis result for SHA-256 39c49583bbf7a3a1…

MALICIOUS

PDF

49.2 KB Created: 2020-07-28 17:47:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d1707db0b42c2b03424e99facb4f6c89 SHA-1: 802d4c9815481228f12f3f41ed4fe9bb0decad66 SHA-256: 39c49583bbf7a3a17b98fa754c673296369ed7a2a4a9b02519cfbd5e8fac216e
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including links to a known malicious redirector and a link farm. The embedded content, though heavily obfuscated, appears to be a lure, possibly a fake error message, designed to trick the user into clicking a malicious link. The primary malicious URL identified is ttraff.ru, which is flagged as a redirector.

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=nested+exception+is+java.+lang.+numberformatexception In PDF document text
    • http://files.buildteacherhub.org/uploads/1/3/1/4/131406505/8552289.pdfIn PDF document text
    • http://files.save4salud.com/uploads/1/3/0/8/130813458/4218209.pdfIn PDF document text
    • http://files.sdena.org/uploads/1/3/1/8/131871850/557dcb45b0610aa.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/1/0429/5163/9196/files/serorolepuruxefebibuwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89573664631.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1266/1152/files/vodewotubumodagesegikatup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3301/0081/files/90822143383.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1792/0934/files/nirufebadupexiwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9467339244.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2619/4342/files/varizemumekikelix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7147/0742/files/delalofeze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/76106621034.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0881/8333/files/jekibaledu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2991/4012/files/18458644561.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1058/0903/files/20566230371.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 4

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_off00007faa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FAA 5704 bytes
SHA-256: 2b557b6593865da601abe3b27e963c360bf4eb606f8c32faf206508898429faf
font_01_sfnt_off00009310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9310 10564 bytes
SHA-256: fb0f91d8f7d6292e0eb1d57f5e6efd382116eaa0c0f4e57d3cc82b08bffd72e2

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