Malicious PDF — malware analysis report

Static analysis result for SHA-256 f336ed478b0aa1c1…

MALICIOUS

PDF

55.3 KB Created: 2020-08-28 08:00:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4a352d009422e20682ddef86111498e9 SHA-1: 1cff638e2a8df65cd840beedf52acffe87e1d6ce SHA-256: f336ed478b0aa1c1e5677e22c9e2a02c1a10a09061d9e9bae9f34253aefad3f8
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a link farm pointing to a malicious redirector. The primary malicious URL identified is https://ttraff.ru/pify?keyword=hay+bin+yakzan+%25C3%25B6zet. The document body is heavily obfuscated and appears to be largely junk data, but it does contain the malicious URL. The presence of a link farm suggests an attempt to distribute malicious content or phishing pages.

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=hay+bin+yakzan+%25C3%25B6zet In PDF document text
    • http://jedujo.clinmicrolab.org/uploads/1/3/2/3/132303382/46e6c.pdfIn PDF document text
    • http://files.stamfordstrings.co.uk/uploads/1/3/2/7/132740606/1655683.pdfIn PDF document text
    • http://remavevan.en.skandiaorgeln.com/uploads/1/3/1/4/131438304/besasuso.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/1/0427/9359/9132/files/73573003785.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5847/1846/files/84901106239.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3745/6534/files/12914427325.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0047/0438/files/3593424601.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4944/1687/files/frca_short_answer_questions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tikifulodu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/9237/8527/files/terod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9200/0412/files/acheron_sherrilyn_kenyon_ita.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/2878/7878/files/unity_lookat_2d.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_off0000993f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x993F 4828 bytes
SHA-256: e9b6d6436b6e0f998fc910c0e26af354c16ef5cdd1b00e69ed9c74e660b850f6
font_01_sfnt_off0000a992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA992 12008 bytes
SHA-256: f20f3f58821bea36bedf09aa214c460f0fda6bd8732744fcf4c43b6c64d8eec7

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