Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f6875a3eb5765c9…

MALICIOUS

PDF

41.5 KB Created: 2020-08-08 23:59:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ba3b6c0cbd4f5c2ddb2537da12a88b2f SHA-1: 40f6ebffe0af4aac2c9f315153c44913cf042b6b SHA-256: 9f6875a3eb5765c92bc006a19073bd2795da663522feece65f68b316c317ad25
194 Risk Score

Malware Insights

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

The PDF document was flagged by a critical heuristic for containing links to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=bonding+agents+in+dentistry+pdf'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many hosted on cdn.shopify.com. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves luring users through these links, with at least one leading to known malicious infrastructure.

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.cc/pify?keyword=bonding+agents+in+dentistry+pdf In PDF document text
    • http://files.nh-ahn.com/uploads/1/3/1/4/131410007/sewopaj_mulegonar_xuwojikuni_luwupufegutinal.pdfIn PDF document text
    • http://navis.acds-clsa.com/uploads/1/3/1/6/131636612/6b74f6a33cc7.pdfIn PDF document text
    • http://files.supremexjoy.com/uploads/1/3/1/8/131856476/7954450.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/1/0427/7708/4070/files/forabegefedodesegerituno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7128/2079/files/precalculus_mathematics_for_calculus_7th_edition_etextbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5096/4904/files/jivenimimamuwivavibise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7588/7523/files/87134682411.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6246/8516/files/lefepamemebin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4599/4146/files/76270720946.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0754/1401/files/group_by_in_r.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/4412/3302/files/wonky_donkey_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3940/7784/files/94139053324.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9156/6493/files/caballo_viejo_partitura_trompeta.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_off00006435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6435 5328 bytes
SHA-256: 69658872815ce0a457019766d3f7240fb2fce37ae25060bc2c23cf8947261040
font_01_sfnt_off00007676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7676 10240 bytes
SHA-256: 7ac210e0a6762decd29933f5d798cc11d20ae2f5bef2bcd97ce5116a64b635e5

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