Malicious PDF — malware analysis report

Static analysis result for SHA-256 b956e9c17321aec7…

MALICIOUS

PDF

37.7 KB Created: 2020-08-12 11:55:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3b40502ea48d492a951fbc291285eb72 SHA-1: 0244f23dc662ae5c045910c5f53f4f9d0c89604e SHA-256: b956e9c17321aec74908e1aceb7e740ce20b42882b3949cdd4c7fc4043a866a4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing indicating a malicious redirector link. The embedded URL 'https://ttraff.ru/wb?keyword=verb%20preposition%20list%20pdf' is flagged as malicious. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, suggesting an attempt to manipulate search engine results or distribute content through a network of linked documents. No scripts were extracted, but the presence of the malicious redirector is sufficient to classify the attack pattern.

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/wb?keyword=verb%20preposition%20list%20pdf In PDF document text
    • http://files.indianaturtlecare.com/uploads/1/3/1/4/131410370/9565658.pdfIn PDF document text
    • http://mobij.gbcdecatur.com/uploads/1/3/1/4/131453150/8256180.pdfIn PDF document text
    • http://files.timberrocklandscapecenter.com/uploads/1/3/1/3/131380299/gaxabif-wipobiwusoba-siwilalobuviziz-mejego.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/1/0431/9048/5150/files/50621953419.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/1033/7440/files/71005976193.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6110/9155/files/roxalavavir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3273/9989/files/cards_against_humanity_print_and_play.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5193/3078/files/4743627972.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2568/6951/files/structural_interpretation_of_seismic_data.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2178/6521/files/bubitajuvexirozugizegokol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9436/8663/files/42206731741.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1389/8403/files/mubegudanawimumepebefaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4351/1702/files/lexus_sc430_repair_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2500/4706/files/antimicrobial_peptides_from_plants.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 4

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_off00005777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5777 4928 bytes
SHA-256: 6af89e5b94f2382e0646a13e788098e64bf82390c2e11922f2eec28646bde8a3
font_01_sfnt_off00006849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6849 10044 bytes
SHA-256: 51447563729c7f918c5892c74d1a45d2fb07b07411c296bad4eb162f644f3342

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