Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf4230ba68f5341c…

MALICIOUS

PDF

43.2 KB Created: 2020-08-19 14:07:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ec09a16af791e4a265e286ef12683382 SHA-1: eff5883c90249a0f0dcee38bd7d099e8109c5f80 SHA-256: cf4230ba68f5341cdb17ddb8a78333b906d0cb3ebcc9f4cdcfc933bd3ae811e8
194 Risk Score

Malware Insights

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

The PDF file contains a mass external PDF link farm, with many links pointing to Shopify-hosted PDFs. One of the primary links, presented with a "clean eating nutrition guide" lure, redirects to a known malicious infrastructure at ttraff.cc. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous SEO-optimized PDF links suggests an attempt to distribute malicious content through a link farm.

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=clean+eating+nutrition+guide In PDF document text
    • http://files.801fig.com/uploads/1/3/1/3/131384797/seniz_tisazoluwapagu.pdfIn PDF document text
    • http://files.cbksteel.com/uploads/1/3/2/7/132741136/9800407.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3582/8124/files/gojupuvujusiropaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4336/4759/files/34715755554.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7415/0809/files/xudefaladutageguse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1618/3198/files/xudatidawagugos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3197/0471/files/bhagavad_gita_full_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/3604/3422/files/dashboard_ppt_templates_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2440/7961/files/37252627052.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3687/6706/files/strategic_planning_job_description.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6872/7194/files/4290804603.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FAC 4720 bytes
SHA-256: 44fa7c1c8d46e1537971b57f1a9f377ab977f2b0eb7c620df4c6369f3d1fa700
font_01_sfnt_off00006fc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC7 10056 bytes
SHA-256: 167dce99793f1297a7790d76206fb0f675c2f1a5b0616cc2018ae15abb80c047
font_02_sfnt_off0000922d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x922D 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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