Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4fbdc1c9d47e20c…

MALICIOUS

PDF

44.5 KB Created: 2020-08-27 23:25:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7ce000178ce832e65d9ca79cddb73377 SHA-1: 02459ea926affda9830a60ed9a8b4a047f3d801f SHA-256: c4fbdc1c9d47e20c00c4ad8a3cef4d27ca519401e2f714f17a453a6fd2fd2740
194 Risk Score

Malware Insights

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

The PDF file contains a link farm designed to redirect users to malicious infrastructure, as indicated by the PDF_SEO_LINK_FARM and PDF_MALICIOUS_REDIRECTOR_LINK heuristics. The primary malicious URL identified is https://ttraff.ru/pify?keyword=los+hombres+por+desgracia+siempre+vu. The document body contains obfuscated text and a reference to wkhtmltopdf, suggesting it was generated programmatically.

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=los+hombres+por+desgracia+siempre+vu In PDF document text
    • http://files.sbwga.com/uploads/1/3/2/6/132695829/7282129.pdfIn PDF document text
    • http://files.indesignz.us/uploads/1/3/0/7/130739081/zotaropipaz.pdfIn PDF document text
    • http://suverid.cyclebavaria.com/uploads/1/3/1/4/131438044/87501fa7cd5fe6.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/1/0432/4117/7248/files/boxoxuxibegoxom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1056/4002/files/delhi_bus_numbers_and_routes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8137/5648/files/physics_james_walker.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8283/3308/files/wodowunakibab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6049/4485/files/81409394228.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2181/1364/files/animal_world_full_movie_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jepomosojavadoji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0671/3253/files/xarufapupiraladilixa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4233/3087/files/30538142426.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_off00006a8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A8A 5596 bytes
SHA-256: 5a467e21f28c84fdd3ab45c9377a106a7787bb4bd7a86f5cddaf679b39471417
font_01_sfnt_off00007d70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D70 11720 bytes
SHA-256: e65a5f3ebcdd922035a885b2d3533ea7690e830641233fd69cc1d814a4c022dc

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