Malicious PDF — malware analysis report

Static analysis result for SHA-256 736c884b65036d81…

MALICIOUS

PDF

35.7 KB Created: 2020-08-07 18:21:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8df167a91b0859b90046c341858ee70b SHA-1: 9c575207554648ef46b72cf6c31f5428dbda684d SHA-256: 736c884b65036d8196c096be8a61d656ad08d410f66929bc1b4e5564eaa528b6
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=matura+angielski+s%25C5%2582%25C3%25B3wka+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to malicious infrastructure. The presence of numerous external PDF links further indicates a link farm or phishing 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.com/pify?keyword=matura+angielski+s%25C5%2582%25C3%25B3wka+pdf In PDF document text
    • http://files.eloisekerr.co.uk/uploads/1/3/1/1/131164402/dumefawavevu.pdfIn PDF document text
    • http://nenurima.newportrecreation.org/uploads/1/3/1/0/131069839/952ac4910a.pdfIn PDF document text
    • http://files.karenhurd.com/uploads/1/3/1/8/131871850/kiwexixud.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/1/0440/8341/3144/files/cae_gold_plus_exam_maximiser_2020_pdf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7274/8710/files/52261271703.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5534/8888/files/97766571535.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3905/5258/files/91146770340.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8494/8380/files/fepewalid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kenawuvotijogajutimev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5332/5224/files/easy_to_build_birdhouses.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8888/5413/files/mevaxuvedagosabala.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/74832969368.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3831/7464/files/58603352790.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 7

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_off00004a0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A0A 5564 bytes
SHA-256: 897eb87dc69f2651978153978f9c71bb1d2d45245be3999ad5ee804ee54c21a4
font_01_sfnt_off00005cf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CF3 11144 bytes
SHA-256: da4d1c67bd3c1cc13215022e784883da986b751964755846ba2152a1ddf255ed

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