Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2c9dfbf57a0afe2…

MALICIOUS

PDF

43.5 KB Created: 2020-08-14 16:48:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d160f66f01ae384500dd9c876a819480 SHA-1: 835f139b547c65a2dbe4adbbeb0ba5f0c111a9e6 SHA-256: b2c9dfbf57a0afe2de83037257d4156138a1224c81fe4c5fa526b094eb9fbf78
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm designed to appear as legitimate educational resources, but ultimately redirects to a malicious SEO redirector. This redirector, 'ttraff.com', is known to host malicious content and is likely used to deliver a second-stage payload. The ML classifier strongly indicates maliciousness, supporting the observed redirection and link farm techniques.

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/wb?keyword=types%20of%20electrical%20cable%20glands%20pdf In PDF document text
    • http://files.janellecox.com/uploads/1/3/0/7/130775987/basoxozalujisod.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/1/0431/1128/4893/files/cambridge_o_level_english_language_past_exam_papers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3943/8486/files/18_x_26_perforated_aluminum_sheet_pan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3884/2779/files/nozibunuzisilorajibezeluz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5544/7202/files/lafirajowonogekar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6657/2443/files/71961072804.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5842/9089/files/menuluwesizuvigepogojag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8230/8002/files/shooter_movie_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2666/9987/files/64253524675.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7663/2217/files/73062115179.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/74140302582.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0432/1184/files/80704522310.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5893/8531/files/operational_amplifiers.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 2

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_off00006c5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C5F 5512 bytes
SHA-256: 686e12060b5ec3ca30f9bfc341124ea02d3b60914b097b6eab53c671fe75228d
font_01_sfnt_off00007f28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F28 10012 bytes
SHA-256: 40b042fb7e51b9a5f3d281aba2c30e53b186c52bde5276631f06ad74ff87b7fe

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