Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c5178ca243efd82…

MALICIOUS

PDF

43.1 KB Created: 2020-08-21 01:18:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 37538d9c7fd465372461800ac2d9d9d7 SHA-1: 9a8af391637c80164543b1cc26ccd742c03cf726 SHA-256: 2c5178ca243efd82f421948e20031d26c17005a41510bbc444b1a48b52a67361
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a link farm. One critical link redirects to 'ttraff.ru', which is known malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content through a large number of seemingly benign links.

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=marvell+tell+iii+scouting+report In PDF document text
    • http://files.tradeinservicesinternational.com/uploads/1/3/1/8/131856433/b77123.pdfIn PDF document text
    • http://files.anglewoodestate.com/uploads/1/3/1/3/131380128/3148301.pdfIn PDF document text
    • http://files.fabianwahl.de/uploads/1/3/0/9/130969037/1868293.pdfIn PDF document text
    • http://files.arlingtonmsband.com/uploads/1/3/1/6/131606087/ddee7.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/1/0438/8392/1563/files/68434318288.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7580/6119/files/60104804949.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3056/9382/files/vocabulary_for_toeic.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1692/6870/files/febokudoginere.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9452/4579/files/a_night_to_remember_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5199/7592/files/bokugazelemar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/23859765904.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3214/9148/files/69737380439.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1509/2894/files/mathematics_statistics_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5101/6601/files/kakolosewokukanizim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0157/6602/files/princess_diana_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4500/3169/files/harley_quinn_comic_book_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/7897/0533/files/automotive_repair_shop_business_plan.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 8

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_off00006b60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B60 5168 bytes
SHA-256: 45c7e0a327548f5df538c3fe40616c9b037f0167f2d50ad9320814c375975cca
font_01_sfnt_off00007d0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D0F 9908 bytes
SHA-256: c3bb22260c5025bfbb15a7e37c9023b5f9f30f8a0a4e8f39bb9e13edafde27a8

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