Malicious PDF — malware analysis report

Static analysis result for SHA-256 18b8d13a60c8f1f9…

MALICIOUS

PDF

45.8 KB Created: 2020-08-14 19:40:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: eb03dffea2ea7ddb60d13244d4158caa SHA-1: db250d7dca196c07ede86ce0de7f7bfe2afd4894 SHA-256: 18b8d13a60c8f1f95b71a9ca2e7d16f2110e5db0ecd38c9b793069a5fe0eddb8
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to a known malicious URL, identified as a redirector for SEO link farms. The document body, though heavily obfuscated, contains text and URLs that suggest a lure for users to click on a link, likely for phishing or malware distribution. 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.ru/pify?keyword=agenda+meeting+sample+pdf In PDF document text
    • http://files.tcmrestoration.net/uploads/1/3/1/4/131407067/nubujisukuvapi.pdfIn PDF document text
    • http://files.vandersystreefarm.com/uploads/1/3/1/4/131406811/roxudef.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/1/0427/6820/3942/files/70003428011.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0714/8185/files/night_by_elie_wiesel_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1861/5975/files/emdeko_sewing_machine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3019/8937/files/muzazokuweradamarajig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4848/5535/files/22252033179.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9072/2469/files/23601341822.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0244/5475/files/bogetuwig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/vakukoduguvi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2678/4157/files/jazipevaxuvabu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4126/5566/files/zuburigixezijaxolekatisuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5653/6479/files/sokakufoseroviloweja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6859/6123/files/61631732146.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 3

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_off0000756f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x756F 5256 bytes
SHA-256: f29802f04846f965bfdb3998c663bd9af818ae4b760946005407367d59768af7
font_01_sfnt_off00008741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8741 10296 bytes
SHA-256: 2d26a332cafe410b981b7bc1991d7a2a4c1d8452e72cce26845fcd839146c1b1

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