Malicious PDF — malware analysis report

Static analysis result for SHA-256 c18ad9e69c7f7c26…

MALICIOUS

PDF

45.8 KB Created: 2020-08-04 12:28:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 82e7098f39baee1f57603a27ee6d8eb6 SHA-1: 390b14ea5c3d01ff886372c5cb881c46e8bd84cb SHA-256: c18ad9e69c7f7c260139c4abc1a66e420a47566283ef882a4f681387eda83a9e
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with the primary heuristic identifying a malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL. The PDF also exhibits characteristics of a link farm, likely intended to improve search engine ranking for malicious content. No scripts were extracted, limiting the analysis of direct execution capabilities.

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.ru/pify?keyword=oxitetraciclina+veterinaria+pdf In PDF document text
    • http://files.starartconstruction.com/uploads/1/3/1/3/131381376/f3494a.pdfIn PDF document text
    • http://files.paramountia.com/uploads/1/3/1/6/131637385/8026294.pdfIn PDF document text
    • http://juvogep.sexoffendercontainment.com/uploads/1/3/0/8/130813420/jepetisol.pdfIn PDF document text
    • http://files.thewrightauthor.com/uploads/1/3/0/8/130813514/8c385e0e.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/1/0440/2990/2998/files/turuzova.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8379/0491/files/kuvexokolum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4012/6629/files/mikabedojamapadojiture.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7315/8806/files/61200884021.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3558/8770/files/famous_anime_movies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6122/9206/files/11284227913.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8158/1209/files/97020248073.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86562581376.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5978/9472/files/kavitalelix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1733/0075/files/exemple_de_certificat_de_stage.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_off000074ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74EA 5124 bytes
SHA-256: eb2905a588d63dd22e11c15c93754ac7e1873240788bfa0e7db7ffc03dd5c483
font_01_sfnt_off00008673.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8673 10456 bytes
SHA-256: 5b6b6be1c8a4e028e5dd4d49911be87ac36668544e9589d436a041144a6a1016

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