Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f483f4af3931d80…

MALICIOUS

PDF

64.6 KB Created: 2020-08-12 04:27:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d06a9e6bbac6b4ac46367f2f141afca0 SHA-1: 173f106a964fca357d4aff25ec69a869f0342854 SHA-256: 8f483f4af3931d80d85975f3cb4a5f7c19d4e5bc7528d22ccf220685d231ee49
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link disguised as a study guide, which redirects to a malicious URL. This URL is part of a link farm designed to distribute malicious content. The ML classifier strongly indicates maliciousness, and the PDF structure suggests an attempt to exploit user interest in free resources for phishing.

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.cc/pify?keyword=benim+hocam+tyt+soru+bankas%25C4%25B1+pdf In PDF document text
    • http://files.mariaevagorou.com/uploads/1/3/1/4/131453252/a03cfe4.pdfIn PDF document text
    • http://files.starwheelprinters.org/uploads/1/3/1/3/131384214/3830577.pdfIn PDF document text
    • http://files.the59edsel.com/uploads/1/3/1/3/131380042/9244822.pdfIn PDF document text
    • http://kekuzase.catholicyouthbhm.net/uploads/1/3/1/4/131454696/2596225696a0.pdfIn PDF document text
    • http://gexarumut.yeeg.co.uk/uploads/1/3/1/6/131607240/e0d448b2a8.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/1/0432/5454/6590/files/6044140433.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/0778/2557/files/creative_chordal_harmony.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0453/2423/9003/files/6350806018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6170/5890/files/global_business_strategy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3760/5544/files/zegowiguwefinebobe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6785/0390/files/42712994358.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4592/0669/files/arco_asvab_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8790/4422/files/modutunosejajorixitozel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5342/4540/files/vaporesso_tarot_nano_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0885/2117/files/77823138475.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8153/9487/files/18603796913.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dubisetebezurazoxodo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5789/5831/files/59520473733.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_off0000b6b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6B5 5748 bytes
SHA-256: a7078c5da90b3ab53d01689dddb9cfc69e8bc7e6398278a909db2d91c5571455
font_01_sfnt_off0000ca1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA1B 13604 bytes
SHA-256: b908581f4b5352689c94adba0bc09f3435ab465dede0340bfcc89e3b0fcf594c

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