Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dc275f7d5a7ac97…

MALICIOUS

PDF

60.6 KB Created: 2020-08-21 02:27:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 51a4dba4f6162009fffa6a1eaaade31e SHA-1: e00bac999814403daa36b3169e37bc09389821d7 SHA-256: 7dc275f7d5a7ac971b96bacb6032e80c1242e61c1f2bdc91c4056b51cab8731c
194 Risk Score

Malware Insights

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

The PDF contains numerous links designed to appear as a link farm for free downloads, but they ultimately redirect to malicious infrastructure. Specifically, the link 'https://ttraff.ru/pify?keyword=cardiac+circulation+pdf' is identified as a malicious redirector. The ML classifier strongly indicates maliciousness, and the PDF structure suggests an attempt to disguise malicious activity through a large number of external 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=cardiac+circulation+pdf In PDF document text
    • http://mogejoda.chickwrestler.com/uploads/1/3/0/7/130739017/kogoz.pdfIn PDF document text
    • http://fegoku.joshuamilton.net/uploads/1/3/0/8/130814761/7227f270b183.pdfIn PDF document text
    • http://nemawe.jennifernomad.com/uploads/1/3/2/3/132303027/paxeponiwetaloxiluf.pdfIn PDF document text
    • http://paxamib.freetherobotcoffee.com/uploads/1/3/2/6/132695213/71dea4.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/1/0432/3871/9648/files/bodybuilding_anatomy_nick_evans.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2721/0144/files/20510202759.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4294/6724/files/85258688438.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7235/6514/files/natalie_portman_lonely_island.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5327/7603/files/6306251275.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8983/6697/files/73171988502.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5380/0859/files/13441689442.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2779/9957/files/creative_writing_portfolio_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4632/9750/files/instructions_form_940.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_off0000b0ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0AB 4876 bytes
SHA-256: 530d1f47ffe5a4776c4ce72d2168c80dce076cf916ba85bf7cd67890e479482b
font_01_sfnt_off0000c150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC150 10608 bytes
SHA-256: de013460bd7c29968a306edce7d4e7a3f8cb4a17af232531ef2e82f755b9e8f3

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