Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c8dcd39445a332a…

MALICIOUS

PDF

38.5 KB Created: 2020-08-25 19:14:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 38ff227365e5dd80fab9cae8fee3a9d6 SHA-1: cd9905097ab14dda5edaf25ce6a61b6b12c9e14e SHA-256: 9c8dcd39445a332a956007e0c9796845c50ea5e5ac9636a29d7ea6a67170095d
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body, though heavily obfuscated, also contains the same URL, suggesting it's the primary lure. Additionally, the PDF is flagged as a link farm, containing numerous external links, many pointing to Shopify domains, likely to obscure the malicious redirector. The ML classifier also strongly indicated maliciousness.

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=free+catholic+wedding+program+template+downloads In PDF document text
    • http://files.dreamcollegedisability.org/uploads/1/3/0/9/130969724/xuparoz_gesusukoje_wapasune.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/1/0433/6268/0984/files/bivaniforowakomutarubes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6980/8550/files/fogusogizibu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4248/7972/files/convert_torrent_to.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6318/9405/files/things_fall_apart_ebook_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2492/5347/files/adjectives_prepositions_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5480/0802/files/agile_methodology_phases_explanation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3455/0177/files/33071418873.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3129/7185/files/92241733789.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_off0000591d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x591D 5532 bytes
SHA-256: 329efe6b35ff3f0704efa00da31e16244ea394bc412189cac72fb6261f98828d
font_01_sfnt_off00006bcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BCB 9892 bytes
SHA-256: 9194bdff0df80cce679edf60b7b936e9807781556c3506024c87c36147c05630

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