Malicious PDF — malware analysis report

Static analysis result for SHA-256 f765eaba4f470b70…

MALICIOUS

PDF

44.9 KB Created: 2020-09-17 00:11:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 14ce5bf72c655d3a81fa92f22200a1c1 SHA-1: 26c59533eee593d33f74c33e0f2ca7e5144645d2 SHA-256: f765eaba4f470b70d0e1455aa1a27654920ce16ceb7f9c58257d7a7c06a0f214
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/wix?keyword=the+cuckoo%2527s+calling+pdf+espa%25C3%25B1ol'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many of which are to unknown or potentially malicious domains. The document body, though heavily obfuscated, contains the same suspicious URL, suggesting an attempt to trick users into clicking it. 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.club/wix?keyword=the+cuckoo%2527s+calling+pdf+espa%25C3%25B1ol In PDF document text
    • http://wireti.wintersilversmiths.com/uploads/1/3/0/9/130969445/faxufene_nekotewowukiv_wujujikuku.pdfIn PDF document text
    • http://newinur.artclassdallas.com/uploads/1/3/2/6/132695969/majodo.pdfIn PDF document text
    • http://gepirub.circularfood.net/uploads/1/3/1/6/131636664/kopopanutavasavepo.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/1/0431/0692/6741/files/ruduxetezez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8896/0933/files/the_psychopath_test_a_journey_through_the_madness_industry_by_jon_ronson.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4578/9600/files/kalagobexud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9334/4924/files/zarizafuvipu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2797/1741/files/sotedewuwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5543/0302/files/rusaluzogizonavexag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zosogorimojafi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9086/9410/files/maxiscan_ms309_not_connecting.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3531/0752/files/boss_katana_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1551/1968/files/bird_43_wattmeter_calibration_proced.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3772/6622/files/d_d_beyond_character_sheet_offline.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4355/2423/files/58910453798.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 2

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_off00006df8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF8 5580 bytes
SHA-256: 55d94c83fb64a2c372dea41a2e682642561db4fe4187e017039033b2244dc1c1
font_01_sfnt_off000080c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80C0 10512 bytes
SHA-256: 72fa1a68821caf5e6ad149ba6d8b9eb7833758769348aaf2151786711db35a27

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