Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d68a63904c09d57…

MALICIOUS

PDF

47.2 KB Created: 2020-07-30 05:57:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 37c1dc88bd1e28806bda557d87eeb750 SHA-1: 91482df3691a7109674d6d25571603648bd830ad SHA-256: 3d68a63904c09d57b92d33ef49c93df080d179d9e35450131d2114ae7a3e9be7
194 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, with a critical heuristic firing for a PDF link farm. One of these links, 'https://ttraff.cc/pify?keyword=mental+health+illness+continuum+pdf', points to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The document body is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create documents for SEO spam or phishing lures.

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=mental+health+illness+continuum+pdf In PDF document text
    • http://files.twinravensstudios.com/uploads/1/3/2/6/132695586/5491901.pdfIn PDF document text
    • http://files.chebeaguerec.com/uploads/1/3/2/7/132741241/3269077.pdfIn PDF document text
    • http://files.offthebeamwoodworking.com/uploads/1/3/2/3/132303189/0cb316d7180.pdfIn PDF document text
    • http://files.prostatecure.org/uploads/1/3/0/7/130739126/wimowu_tigudamidupuleb.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/1/0428/5884/0223/files/40625915821.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0127/3755/files/penudinuratewobanotirusep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6016/5797/files/88879851397.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2905/4118/files/sesuxofatabeziripewel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1655/2605/files/tifiradanovif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7453/4041/files/25550046969.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9936/3222/files/bizijofideruwuzegifegolo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7238/8249/files/kukimaxumuriwosoti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4164/3928/files/rakonefoti.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 8

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_off00007c47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C47 5188 bytes
SHA-256: 1a2d2cbd025c59bde2375020415f9388df52ee5fdd54d58d7c514c4c0b25ca71
font_01_sfnt_off00008dc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DC0 9940 bytes
SHA-256: 7c47cb94501162552e07bc25eab0ae56a6d3115e5438fd4b21915aed3f16e12a

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