Malicious PDF — malware analysis report

Static analysis result for SHA-256 afc671b17c6190fe…

MALICIOUS

PDF

35.0 KB Created: 2020-09-16 01:14:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 78777bb5830d4cf936129ff8be1f342e SHA-1: a4f7fb373dafe780a9831d3cfd767871cc3f5c75 SHA-256: afc671b17c6190fe29dd959fff2832f33b799d05198d9f7788d03c29795a6c37
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a mass external link farm, with a primary link redirecting to malicious infrastructure. The document body, though heavily obfuscated, contains text referencing 'Nintendo dsi manual' and the malicious URL, suggesting a lure to trick users into clicking the link. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the redirection to known malicious infrastructure.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.club/pify?keyword=nintendo+dsi+manual In PDF document text
    • http://zibupo.citizensforcivicrenewal.org/uploads/1/3/1/4/131453915/sobolevev.pdfIn PDF document text
    • http://files.vandalsgames.com/uploads/1/3/0/8/130874683/pipowuxezujijume.pdfIn PDF document text
    • http://zufin.wordsplusthoughts.com/uploads/1/3/1/4/131453870/bb024a3f49254.pdfIn PDF document text
    • http://files.smaexhibition-upcloseandfaraway.org/uploads/1/3/1/1/131164462/5635740.pdfIn PDF document text
    • http://files.nswspruikle.com/uploads/1/3/1/4/131407284/zutari.pdfIn PDF document text
    • http://files.freezeyogurtbar.com/uploads/1/3/2/6/132696465/6031327.pdfIn PDF document text
    • http://files.humanmovements.com/uploads/1/3/2/7/132740892/rilivuxidufexatesime.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/1/0429/0094/7103/files/digubaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7146/3831/files/73151122633.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7899/1520/files/72387461349.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_off00004caa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CAA 4844 bytes
SHA-256: 89c254d4424be30c7f64e153db8dfc5984705f456df78d4aeec0e6e2ffe478dc
font_01_sfnt_off00005d13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D13 10336 bytes
SHA-256: 970819f9fce22dd06b88fad2fdf04bbe9fb835b620edcc2627b632b290e44202

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