Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cf7682bbc8bd139…

MALICIOUS

PDF

38.4 KB Created: 2020-08-05 00:12:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 51366c1d0474639f3cbe6aff8640e9a9 SHA-1: 85676bcfb3bffb23ade97bd8e2f2c70194cf4834 SHA-256: 4cf7682bbc8bd139759909ba922335e8e84019f0322e25f75c470aaae3aa8c58
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical redirector link pointing to `https://ttraff.ru/pify?keyword=certificate+of+completion+and+compliance+pdf`. This indicates a social engineering attempt to lure the user to a malicious site. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is sufficient evidence for the attack pattern.

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.ru/pify?keyword=certificate+of+completion+and+compliance+pdf In PDF document text
    • http://xokis.portraithomesnh.com/uploads/1/3/1/4/131407263/vuzogu.pdfIn PDF document text
    • http://files.artistscorner.gallery/uploads/1/3/0/9/130969206/2318.pdfIn PDF document text
    • http://files.restyle-homestaging.com/uploads/1/3/2/7/132710665/9463677.pdfIn PDF document text
    • http://files.wisconsinhardyplantsociety.org/uploads/1/3/1/6/131606011/3057d903f8.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/1/0430/0718/0954/files/catfish_farming_business_plan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2353/1175/files/sigipobojafiruwesefoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0718/0954/files/capitalismo_socialismo_e_democracia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3900/6632/files/xewekanudufajus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5014/5704/files/84881414028.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/wijod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pazutorigixasozesilax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9117/3278/files/levidufodobitivevuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6176/3480/files/32959290186.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2236/6366/files/xipiporini.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4222/5832/files/marez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0131/5491/files/12433637207.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_off0000590c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x590C 5028 bytes
SHA-256: 67538fc5eed89f84f36862954bbbde049debb2bb68914ff44f36a202e194fb87
font_01_sfnt_off00006a0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A0C 10164 bytes
SHA-256: 2ca5e6dd6d2b59eb09bea836903ea2780c4c82a599ee2ca1676e66e720897f56

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