Malicious PDF — malware analysis report

Static analysis result for SHA-256 9df1f33ecf9f8891…

MALICIOUS

PDF

51.2 KB Created: 2020-08-10 03:20:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4cf51224d17bece80e323bab5fb8a5f1 SHA-1: e7d84d6a5dac23f4fb6152fa1180073f8f87fd0c SHA-256: 9df1f33ecf9f88916b596f1c5f64bf972045b502f21ae261eb98f5b293706dc4
234 Risk Score

Malware Insights

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

The PDF document contains a lure to install a browser extension or update, which is a common social engineering tactic. It embeds numerous links, including one to a known malicious redirector at ttraff.com, disguised as a link for 'free software to annotate pdf documents'. This suggests the primary goal is to lead the user to malicious infrastructure, likely for further exploitation or malware delivery. No scripts were extracted, limiting the analysis of direct payload execution.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/pify?keyword=free+software+to+annotate+pdf+documents In PDF document text
    • http://files.sctecentralfl.org/uploads/1/3/0/9/130969507/418330dce.pdfIn PDF document text
    • http://files.8thdistrictlay.org/uploads/1/3/1/4/131453451/refusazapenovokufeno.pdfIn PDF document text
    • http://nuvox.beavertonmusicdepartment.com/uploads/1/3/2/8/132816066/4930ddafcc.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/1/0430/6265/7177/files/vufetapezabunatetalol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7944/8216/files/13617251961.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3294/2504/files/buzemirevenuja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6741/6488/files/42576022986.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8259/6004/files/88972220.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6982/4414/files/15809300833.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/512381250.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9291/8947/files/lomulimujejikagitud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/92116636396.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/kasamilusobi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2991/1957/files/ludusotu.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 7

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_off00008a8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A8B 5316 bytes
SHA-256: c6b3a916981ef358c7fe3393ede964c1ea74b6a01bb8a03fccf3a3b878dbd66d
font_01_sfnt_off00009ca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CA1 10296 bytes
SHA-256: 506387c1943677aede271486daee1ad8ecd122a934480a4ac5e3953655bdf6e0

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