Malicious PDF — malware analysis report

Static analysis result for SHA-256 23c9811c209b1bbd…

MALICIOUS

PDF

57.7 KB Created: 2020-08-17 01:13:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 358b4d5fe06ded44b97a76eb8be642d4 SHA-1: fb6f3c649aaa5ac689e968855a926db3d77e66a0 SHA-256: 23c9811c209b1bbd752ae0f740729c9c0841d8b77a3fda8d3b9c0ff68a87c790
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body also contains this URL, presented as a free download lure. The presence of numerous external links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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=telecharger+formations+video2brain+en+c+gratuit In PDF document text
    • http://files.chambersjewelry.com/uploads/1/3/2/6/132695517/aa77e8e8f378.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/1/0449/2463/3243/files/life_cycle_costing_analysis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5520/0918/files/93039938178.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7546/0515/files/basketball_court_templates.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5391/5043/files/44754201206.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5896/1315/files/zabefajoxawasodafe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4121/6929/files/betty_crocker_best_bread_machine_cookbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/0145/0396/files/le_participe_pass_employ_avec_l_auxiliaire_avoir_exercices.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1765/6731/files/wolfgang_puck_pressure_cooker.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7305/2575/files/l_anaphore_et_la_cataphore.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6108/3301/files/anglo_norwegian_fisheries_case.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008ccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CCF 5716 bytes
SHA-256: d14729b13e763184cdb1db03c9215d3e6f67635be44a77e762edd411a6750414
font_01_sfnt_off0000a023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA023 10576 bytes
SHA-256: a5c20f1a9547b23d7ee32df84f4e6a2a1d73eac24730a8b20cbf37a123b006b7
font_02_sfnt_off0000c44b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC44B 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449

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