Malicious PDF — malware analysis report

Static analysis result for SHA-256 65b183982ef314a7…

MALICIOUS

PDF

73.9 KB Created: 2020-10-25 08:12:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 5b974f7a4546f00fd571706a6e17bc2a SHA-1: e3837101aaf208936b32b7f0ad0e99f317b1e82c SHA-256: 65b183982ef314a7510b6f615c26549f5939775aa87402bda02558e5ffdd5e7b
182 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to disposable hosting, designed to redirect users to malicious sites. The primary redirector URL is cctraff.ru, which is flagged as malicious. While no scripts were extracted, the PDF structure and embedded links strongly suggest a phishing or SEO poisoning attack aimed at driving traffic to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9821

Heuristics 4

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cctraff.ru/wb?keyword=catecismo%20explicado%20de%20la%20iglesia%20catolica%20pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365621/normal_5f88b47973c07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368506/normal_5f8ba465dd93f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366335/normal_5f8eb38e565ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377401/normal_5f8d3b476c191.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389606/normal_5f8ea59a6cc84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401519/normal_5f91bb1a1262b.pdfIn PDF document text
    • https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/5518131.pdfIn PDF document text
    • https://kamijiruwidezi.weebly.com/uploads/1/3/4/3/134387945/ritipikaz_kekuwuraxuba.pdfIn PDF document text
    • https://gepobuxew.weebly.com/uploads/1/3/1/0/131070920/vatelunezesore-rodarisuxuwejux-lugolupunu-sazuxirudu.pdfIn PDF document text
    • https://kekerisasil.weebly.com/uploads/1/3/0/7/130775365/5061547.pdfIn PDF document text
    • https://bixizevabusiku.weebly.com/uploads/1/3/4/4/134403351/c9d9fd68.pdfIn PDF document text
    • https://pexulowiseguwuz.weebly.com/uploads/1/3/4/3/134391342/jebaxodorixuk_nizafutufo_potola_benapovafagedi.pdfIn PDF document text
    • https://jakemujilofadam.weebly.com/uploads/1/3/1/3/131380171/2250669.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/decf8a55-881c-4208-9f97-18c76553178c/vedalorazumolo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5ed4790-8540-4046-9ffc-fcdfd3a2a742/the_book_of_st_cyprian.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/381dfabf-e43d-47e6-8b14-d748d4de6fe9/84736570735.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4993/4229/files/zesuririwuwugisekom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4809/0270/files/52275098652.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/6716/6886/files/iron_blade_mod_apk_android.pdfIn PDF document text

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