Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a15b69a1a5e9481…

MALICIOUS

PDF

46.8 KB Created: 2020-08-03 11:56:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1854cc2f0d58522e570c690b82cfb5d4 SHA-1: 7d95b08ac18ef299e558de4dd217f0927690f205 SHA-256: 9a15b69a1a5e94811b9fa37b6e4dc7f86e52fc1a4c04cc7dad138a39773334d7
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a redirector URL, which is a common tactic for distributing malware or phishing pages. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The ML classifier strongly indicates maliciousness, and the PDF structure is consistent with link farms designed for SEO poisoning.

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=how+to+speak+english+fluently+through+tamil+pdf+free+download In PDF document text
    • http://files.davemounsey.com/uploads/1/3/0/8/130874614/5728280.pdfIn PDF document text
    • http://files.cusweb.com/uploads/1/3/1/3/131383651/8834369.pdfIn PDF document text
    • http://files.mse2opiodepidemic.com/uploads/1/3/1/4/131453718/3c70460122d7.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/1/0430/0495/2735/files/traditions_and_encounters_6th_edition_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/17007356869.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6695/6707/files/44630875955.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3021/6855/files/1296152790.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/gta_5_free_download_ps_vita.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6773/6225/files/bagotijelidejavibogekeve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0876/1764/files/80679091996.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kurejala.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3657/1805/files/87583775842.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1550/4029/files/51011476771.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4532/8808/files/54228671156.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1089/1680/files/kuginurefepevebuju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1940/2405/files/mitaxude.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_off00006d61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D61 5672 bytes
SHA-256: 286807913005df7fca8d3d95f5de3583bdd14ab2ddd38b7d23d4204871ce2a19
font_01_sfnt_off000080a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80A3 14404 bytes
SHA-256: 2d8f91c4e76d87db8439905a964493b5be673619513fd29cda83132e73394ec0

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