Malicious PDF — malware analysis report

Static analysis result for SHA-256 404fa6831ac3496b…

MALICIOUS

PDF

32.3 KB Created: 2020-09-19 01:31:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 35469296603e7bfc182f79f45b3d3e20 SHA-1: a8ec447eeb222b74eefb5818b2c6f64c3dd3ab86 SHA-256: 404fa6831ac3496b3432c3e3b41b6e58710e615768f13e0a24604db493ce3649
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing for a malicious redirector link. The document body also contains the same suspicious URLs, suggesting a lure to external malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful sites.

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.link/wix?keyword=cities+skylines+best+maps+reddit In PDF document text
    • http://xisipo.fear-to-faith.com/uploads/1/3/1/1/131164250/naxukun.pdfIn PDF document text
    • http://lajivelap.artebom.com/uploads/1/3/2/6/132696067/3972911.pdfIn PDF document text
    • http://files.rosevillejunctiondemocrats.com/uploads/1/3/1/4/131408415/vatepuzusi.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/1/0429/9656/4131/files/fezenipi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7131/5876/files/google_apps_script_sheets_to_calendar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3348/4702/files/walmart_canada_twin_sheet_sets.pdfIn PDF document text
    • https://b67c0689-6e3b-4c15-911e-24be38b9fa10.filesusr.com/ugd/51c472_3e9e74102fc04d49a817acdd28933b0d.pdf?index=trueIn PDF document text
    • https://4ffb9bb3-1194-46b1-8912-e07bb8e9a44a.filesusr.com/ugd/229b11_8c2cf5596f0d4428b12ea982a2b9ebc5.pdf?index=trueIn PDF document text
    • https://40a7618a-994c-4a19-86a2-c1448ff3c471.filesusr.com/ugd/cf5aa9_037c209cd06e4968be344d9beff9cc66.pdf?index=trueIn PDF document text
    • https://2f076b5d-253e-4335-8b09-c05081c49740.filesusr.com/ugd/b85eb0_fa5124d0719b49e59b6ee8ac36cf3a70.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5655/4394/files/13284783680.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8573/9670/files/competition_commission_south_africa_guidelines.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_off00004429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4429 5316 bytes
SHA-256: 3cad9f1f6da95d8ad65e456191ff2a641dc648b75c39657f4d208f07dc1aa94f
font_01_sfnt_off00005622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5622 8980 bytes
SHA-256: cb803552184316c7a12d6766d7e0f4493bf93a70ad8c0e32bafe87112def09fb

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