Malicious PDF — malware analysis report

Static analysis result for SHA-256 70ac47a775d87c1d…

MALICIOUS

PDF

41.9 KB Created: 2020-08-09 19:35:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 427c221d67c45320fade581709ac1fe2 SHA-1: 06f359708dcd7277ad509c130647b3b912fd9a15 SHA-256: 70ac47a775d87c1d9eeb0ef1ec35d7777647689eca92fe870b6b0b3b07cf607f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service that is known to host malicious content. The document body and heuristics indicate a lure for a 'free course' to entice users to click the malicious link. The ML classifier strongly indicates 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.com/pify?keyword=cours+anglais+intensif+gratuit+pdf In PDF document text
    • http://files.rachaelfrankford.com/uploads/1/3/0/7/130739268/datep.pdfIn PDF document text
    • http://files.stitchedwithcare.com/uploads/1/3/1/3/131383624/dowumi-wefudazebukop-wivavin-tajewowe.pdfIn PDF document text
    • http://files.astarboards.com/uploads/1/3/0/7/130775653/1d36160d.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/1/0433/8145/7061/files/veponuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9480/9512/files/25817698781.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3009/3728/files/46935742219.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5247/4280/files/woxetavilirolesobi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5269/5703/files/web_developer_s_guide_tutorialspoint.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6838/3641/files/difuzipumurolowo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1708/3802/files/ssc_stenographer_reasoning_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7449/4369/files/40929967985.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7500/9696/files/effective_isotropic_radiated_power.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40369191557.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/4156/6370/files/dnd_saving_throws.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 8

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_off000062a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62A2 5112 bytes
SHA-256: d904f189ee6260a7a626d0bd710c071d7a4475132a92bbb989028b33948eb412
font_01_sfnt_off00007415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7415 11888 bytes
SHA-256: daf6b39b2db0c99eaa5c7785bf6105d7576c6f9a39cb3c3daa332a3ed3f81ccf

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