Malicious PDF — malware analysis report

Static analysis result for SHA-256 0494c82276634417…

MALICIOUS

PDF

59.5 KB Created: 2020-08-19 21:21:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 288584db433b84d2b87c5888d6a26d63 SHA-1: 40293163d714899a8fffcb8570f28bf368e113a2 SHA-256: 0494c822766344174bd30497674692706f54affa6b809163c26f9a0e8dd25560
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it is a malicious redirector, specifically designed to lead users to a link farm. The primary malicious URL identified is https://ttraff.ru/pify?keyword=nabucco+libretto+pdf, which is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains this URL, suggesting an attempt to disguise its malicious nature.

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=nabucco+libretto+pdf In PDF document text
    • http://files.kingtonfoodfestival.co.uk/uploads/1/3/1/4/131453170/nojejixorigata.pdfIn PDF document text
    • http://files.hrcm.org/uploads/1/3/1/6/131607029/71f926a7.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/1/0432/8334/9657/files/how_to_speak_english_fluently_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/16691509150.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7196/3296/files/83645724766.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1924/5467/files/mausam_ki_baarish_song_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2093/5590/files/ripup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3296/0409/files/princeton_architectural_press_submission_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2646/3392/files/74564921117.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9684/2142/files/41847152252.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0123/4076/files/38280150713.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6043/5873/files/regelusaxu.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 5

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_off0000ad22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD22 5080 bytes
SHA-256: cb190937900308917e160d73bd9426dc7b8eee9d6012e8bf81d942f275c9fa1d
font_01_sfnt_off0000be6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE6F 10172 bytes
SHA-256: c3d1d36756aaf62d69a27fd6c6b6e10acde17cee8919ea4bee4664661548bb27

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