Malicious PDF — malware analysis report

Static analysis result for SHA-256 051a5881d7328352…

MALICIOUS

PDF

42.4 KB Created: 2020-08-02 23:58:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f53670bc6fa0ea867a718c4546a0da8f SHA-1: 0d49c61dd97eefe7508964f585b0882c9b3e7cf9 SHA-256: 051a5881d7328352b8778cf0131fa049e46ac0883a87c65185a364c482ab542b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links, many of which point to a redirector service known for malicious activity. The presence of a link farm and a redirector suggests an attempt to direct users to malicious websites, likely for phishing or malware distribution. The ML classifier also strongly indicated maliciousness.

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=php+print+array In PDF document text
    • http://files.murray-company.com/uploads/1/3/1/3/131379510/sosat.pdfIn PDF document text
    • http://files.bustenibaptistindependent.com/uploads/1/3/1/8/131871704/3592280.pdfIn PDF document text
    • http://files.successwa.com/uploads/1/3/0/7/130775310/dfa327ad36fe46.pdfIn PDF document text
    • http://files.lafayettealumnae-dst.org/uploads/1/3/1/8/131871659/4a51cc3a392b.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/1/0428/1945/3095/files/55535342282.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4136/6951/files/66468609464.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6591/8118/files/tumblr_audio_player.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6488/5397/files/48921596678.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8890/3325/files/zubinozepap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4950/8250/files/miladap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jokopewizemaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61411835552.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1542/1600/files/18230385637.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8783/8886/files/45680855278.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6806/2872/files/bazuwoterarubere.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 4

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_off00005f71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F71 4800 bytes
SHA-256: 4e746b65bab7d56cadd8937b178c395c1821b4b3d5653f8f0a8e6033ed4699fe
font_01_sfnt_off00006fc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC4 14272 bytes
SHA-256: 2aa1f5cd2f4bfeb69692e57d864eff074a7711f2f594a352af936155ac324b26

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