Malicious PDF — malware analysis report

Static analysis result for SHA-256 c98e806bcaf5cdc7…

MALICIOUS

PDF

41.2 KB Created: 2020-08-05 08:10:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1504f0c191a8a946da070a4cf5d86dfc SHA-1: 34145fcf9f4e1c0036b048fe3915a03d4be99b29 SHA-256: c98e806bcaf5cdc736bf7353bb0cd8a173e2f8a5831d24839f4dc8be40b07307
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a document about healthy school nutrition. The document also hosts a large number of external PDF links, many of which point to Shopify domains, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector URL confirms a likely phishing or redirection attempt.

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=alimenta%25C3%25A7%25C3%25A3o+escolar+saudavel+pdf In PDF document text
    • http://files.darlfinne.com.au/uploads/1/3/1/4/131437775/ed94e629038.pdfIn PDF document text
    • http://files.literateinaminute.com/uploads/1/3/1/4/131483234/1172960.pdfIn PDF document text
    • http://xajisi.stjosephtrenton.com/uploads/1/3/1/4/131453850/6948005.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/1/0432/2417/0664/files/metasinafavagebe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1046/3643/files/33842773641.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0291/2158/files/gta_5_cheats_ps4_phone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3383/7219/files/greek_math_symbols.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2313/0009/files/28520659512.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6745/7188/files/470uf_16v_capacitor_datasheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3628/6877/files/83848177211.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2521/0263/files/jovuzepolifusenatelifo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2173/6859/files/business_communication_process_product_9th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7647/6311/files/39064455177.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0744/1053/files/data_science_from_scratch_2nd_edition_download.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_off00005ec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC3 5852 bytes
SHA-256: 94a6d099babd545f3f037d066c8cdfd40593e8cd01a059e8cd8a850545f090d1
font_01_sfnt_off000071c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71C5 12004 bytes
SHA-256: 6968e19e0da4c9f4814bda87e149a55d2465a4de4d9a6f752e03e4f42ff4715d

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