Malicious PDF — malware analysis report

Static analysis result for SHA-256 566605837b2dce31…

MALICIOUS

PDF

45.7 KB Created: 2020-08-11 20:47:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 90c0802c64f65da6ff6a7629d161bf5c SHA-1: deb502b8f3405b09996a25e2053e829461959b3c SHA-256: 566605837b2dce3197aea7d79ebcbe87d872927dad7d27ccc8e11ea8a678e1fd
194 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of a large number of external links, a technique often used to redirect users to malicious sites. One of the embedded URLs, 'https://ttraff.ru/pify?keyword=antiviral+agents+pdf', is flagged as a known malicious redirector. The document body contains obfuscated text and references to 'antiviral agents pdf', suggesting a lure to entice users to click on the links.

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=antiviral+agents+pdf In PDF document text
    • http://files.montessorilawrence.org/uploads/1/3/1/3/131384777/juwidip_zixexitoje_zagenuxomipi_sixajedoroliwiw.pdfIn PDF document text
    • http://files.vandusermo.org/uploads/1/3/1/3/131379759/4322143.pdfIn PDF document text
    • http://pukez.winonaffa.com/uploads/1/3/2/6/132681352/6b750f6707.pdfIn PDF document text
    • http://files.firstcovenantsuperior.org/uploads/1/3/1/6/131606640/vovutunapejedidure.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/1/0448/4258/2176/files/chess_explained_the_queen_s_gambit_declined.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2626/7806/files/46601531512.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3640/8982/files/nic_network_interface_card.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8152/2599/files/29341763151.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8221/1733/files/18241221828.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6022/3397/files/jidomowu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1438/8888/files/99791545062.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9018/2297/files/97331316577.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8360/3876/files/sadopazerafitevipomesavo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8209/6535/files/73170254419.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3529/5905/files/45237891558.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_off0000745c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x745C 5256 bytes
SHA-256: e3c676e7acf00e92d82be7c2f8e7dd0dfe05d99cc4b641996d1cbc369d5be1a8
font_01_sfnt_off0000864f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x864F 10356 bytes
SHA-256: ee16b2ecc0d0544393c30e7e7421647a8eae777ddab471d1a9e633b63ccf8a71

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