Malicious PDF — malware analysis report

Static analysis result for SHA-256 399c4b12355e3ef2…

MALICIOUS

PDF

39.0 KB Created: 2020-08-20 21:41:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 96f7f9cc7eca6c018a3e125f58f3c188 SHA-1: 8429790b304babf7d99c9049a627b107f6296762 SHA-256: 399c4b12355e3ef2e2e19cbee6e85ca6363e2b3ec2bb3398df0739641c8e0a09
194 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by a machine learning classifier and contains a large number of embedded links. One critical heuristic identified a link to a known malicious redirector service, ttraff.cc, which is likely used to obscure the final destination of the attack. The document body, though heavily obfuscated, also contains this URL and other benign-looking Shopify URLs, suggesting a link farm or SEO poisoning tactic to distribute malicious content. The primary attack pattern involves redirecting users to malicious sites through a network of links.

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=html+form+attributes+pattern In PDF document text
    • http://nigolimel.regalrouge.com/uploads/1/3/1/8/131871454/zefubob.pdfIn PDF document text
    • http://files.jointeducationteam.org/uploads/1/3/1/4/131406344/balakedomara.pdfIn PDF document text
    • http://rowunofo.ribcityshootout.com/uploads/1/3/2/7/132712676/nikopazon_debidalanozipuv_kaxete_vobut.pdfIn PDF document text
    • http://xerodizen.cityislandlines.net/uploads/1/3/1/4/131482975/nanuzetiwevo.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/1/0429/8443/9971/files/31041577220.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5573/5193/files/53180492207.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1036/5339/files/26922275766.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2278/6466/files/acute_tubular_necrosis_pathophysiology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3164/2780/files/91178447309.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4885/2894/files/speedaire_compressor_manuals.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2343/2861/files/80975890895.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7192/2591/files/wifonegozononoguvorijasif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8091/7926/files/definicion_de_polisacaridos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3722/8188/files/pezifewonuzilezujipo.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
🗂 Part of campaign: cityislandlines.net 6 samples

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_off00005b81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B81 5148 bytes
SHA-256: 6932820e5041a6384880c8d1d6af12706c2f9b38dcd315bac0dfd2f95954528d
font_01_sfnt_off00006ce1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE1 10100 bytes
SHA-256: 247810589e6e93c3f078a2c9a3e7587f4e07a0ea850edf311d0284056081b139

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