Malicious PDF — malware analysis report

Static analysis result for SHA-256 f57159c2c8b58207…

MALICIOUS

PDF

45.1 KB Created: 2020-08-25 03:07:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3f0263cb558158c6d33ea3b7537f4b66 SHA-1: 3149ffbf882716e4d8eea3193cc6d8f7b8be2867 SHA-256: f57159c2c8b582079b64e18be89e39b411cead418df0d5bc3c8b3fd60ef4ae39
194 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of a large number of embedded links, a technique often used to redirect users to malicious sites or distribute malware. One critical heuristic firing specifically flagged a link to known malicious redirector infrastructure. While the document body contains garbled text and what appears to be metadata, the primary threat stems from the link farm. No scripts were extracted from this sample.

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=mesozoic+era+life+forms In PDF document text
    • http://files.akersart.com/uploads/1/3/2/6/132681771/noziwasowikewe.pdfIn PDF document text
    • http://basovuxul.frankvanbogaert.com/uploads/1/3/1/0/131070331/b762cad73db21.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/1/0461/3390/3513/files/congressional_committees_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/zafilitafuwovesoboz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9291/8937/files/jewogoramibitazutunokome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9969/0910/files/lixejafawenotikidipul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4908/2264/files/59325258559.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6290/0374/files/ak_47_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3766/2103/files/malawi_cichlids_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7341/4055/files/samotefikiti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4632/9750/files/bixaropopujo.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 3

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_off0000731c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x731C 5084 bytes
SHA-256: 41a1792d8b647041eea8c63d01ab72d856295e995528091e8d2f28e4a95a9b81
font_01_sfnt_off00008458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8458 10404 bytes
SHA-256: 6aaa2536701b9bc7e4e032e928b6124f049167c672b1e5234567fdfa9c16658f

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