Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cdf436c693fd479…

MALICIOUS

PDF

56.6 KB Created: 2020-07-31 05:24:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 946c6961f438d50d7b6683069105bd1d SHA-1: f3611e861d32210f6fe32715bb33431ed6059cab SHA-256: 1cdf436c693fd47915e22f0401b4a6a5453e386ee14e48d6acb029271b399e62
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, masquerading as search results for song lyrics. One of the primary links directs to a known malicious redirector, ttraff.ru, which likely serves as a gateway to further malicious content. The document body, though heavily obfuscated, appears to contain metadata related to wkhtmltopdf and the search query, reinforcing the lure.

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=you+are+the+reason+lyrics+and+chords+pdf In PDF document text
    • http://files.gobandits.net/uploads/1/3/1/4/131408502/fotowujegu_gedeximidududi_natef.pdfIn PDF document text
    • http://files.spiritofsaron.com/uploads/1/3/2/6/132682204/ef5fe19b26d.pdfIn PDF document text
    • http://files.internationalcancercluster.org/uploads/1/3/0/8/130813100/a03c032.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/1/0440/7099/4085/files/pimineripepewofuxedes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3486/1987/files/defewusigorupapomi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7247/1715/files/veweko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0801/6027/files/batosipa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4686/9915/files/55850461640.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3423/0429/files/feviz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2639/0946/files/812676728.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1267/0111/files/ruwulebudagimibuva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/vuvijojavazumulatenifot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9744/6816/files/fuguzem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4388/0103/files/zaxipipafafegidiw.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008afb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AFB 5188 bytes
SHA-256: ca68e8c47b8c1e37fc49fb1e261532ba5ebb4ba43d768af6f96b5c14414b6927
font_01_sfnt_off00009c9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C9E 10136 bytes
SHA-256: 09ab274a985c299d30d632a37504debfa544526ea71456339ebefb13fef62314
font_02_sfnt_off0000bf71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF71 16120 bytes
SHA-256: fb7b45e24c28c4473d0ca1c6410c593992d9a809009f9c41b5ae32c9142507dd

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