Malicious PDF — malware analysis report

Static analysis result for SHA-256 3efc4a6987e41777…

MALICIOUS

PDF

45.6 KB Created: 2020-08-09 17:55:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4ecf0b639db8e21697afa46f81663e27 SHA-1: e4238cb1b362960b978ea9505a2075b088beec04 SHA-256: 3efc4a6987e41777e786b48114ea7f5f8c129bed1f03cb0b99d7155d1b3bb4d1
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.003 Command and Scripting Interpreter: Windows Command Shell

The PDF contains a large number of embedded links, many of which point to a redirector service. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure. Additionally, the document body contains instructions that suggest a 'copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context' lure, indicating a potential attempt to trick the user into executing commands. The primary malicious URL identified is https://ttraff.ru/pify?keyword=centos+commands+cheat+sheet+pdf.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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=centos+commands+cheat+sheet+pdf In PDF document text
    • http://files.jetsettista.com/uploads/1/3/1/4/131437919/fejugofiropugaj-sixujeg-somorizuma.pdfIn PDF document text
    • http://files.ekshrine.com/uploads/1/3/1/3/131384660/vozisawaliromo.pdfIn PDF document text
    • http://files.chardoncommunityactionteam.org/uploads/1/3/1/3/131384018/pugotut-newifuniz.pdfIn PDF document text
    • http://tomape.anncarragher.com/uploads/1/3/0/7/130739615/vomezatu.pdfIn PDF document text
    • http://lexipo.bthnm.org/uploads/1/3/1/6/131606552/menaxuwowiwuza_lifuvikupipo_topoguti_vugewekunerani.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/1/0437/6671/0433/files/95514445845.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1959/0040/files/agenda_2020_ua.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2739/8807/files/grammy_awards_2020_winners_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0460/8155/files/63587281173.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7931/9196/files/sonotefezed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6807/0824/files/2261441131.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5870/8118/files/8837892790.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2094/9403/files/javascript_add_to_array.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0849/1673/files/migapusepixiwegimijof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4335/6821/files/didejiwoleraxafixep.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_off00006ae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE1 5172 bytes
SHA-256: 3d11930beef15c8ab4cf5ddfb5ae8f9da087f64fe384895ce9213b3cd93628e1
font_01_sfnt_off00007c52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C52 14532 bytes
SHA-256: df550325fe5c2ce8c9f5dca23fdb2b5214be84f8b378caed83e2c75c3c82503b

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