Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ddf85908a9971ed…

MALICIOUS

PDF

37.5 KB Created: 2020-08-22 00:04:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 69c93de93859ed5fa0db4fb1b5ac96f9 SHA-1: 43dbb0e51406f66b6ea610ea326dd0ecb411b73f SHA-256: 4ddf85908a9971edad0fc28e86267cd4661f09eb93c1e9ecb5597bc5be13bcb8
194 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. Additionally, it exhibits characteristics of a PDF SEO link farm, embedding numerous external PDF links. The document body, though partially corrupted, contains a URL that aligns with the malicious redirector finding. No scripts were extracted from this sample.

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=bagpipe+sheet+music+for+going+home In PDF document text
    • http://files.elliotgardner.com/uploads/1/3/0/7/130775679/niredovevifijamolu.pdfIn PDF document text
    • http://files.stbrendansreds.com/uploads/1/3/2/3/132303024/turidibutira_kesanekafasow.pdfIn PDF document text
    • http://files.utaps.org/uploads/1/3/0/7/130775191/8226270.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/1/0435/4929/4756/files/pdf_bhagavad_gita_in_marathi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lofexunixepufatomubudabak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6999/7217/files/32874749936.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6067/4198/files/73185929194.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/3908/8794/files/gekodepab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0840/1306/files/metodos_anticonceptivos_colombia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9105/7058/files/75205227153.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/2945/7064/files/50007108679.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0290/4222/files/bescherelle_espagnol_pour_tous.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 7

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_off00005474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5474 5444 bytes
SHA-256: 04b17bbe61adbf3576677bdec55d53821193d215f5a505a85a7845463ef852ac
font_01_sfnt_off000066db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66DB 10016 bytes
SHA-256: b5d693883346a5f178fc73b287e5d9293a8f47392935507955d2108c088b388d

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