Malicious PDF — malware analysis report

Static analysis result for SHA-256 45d12be7973873da…

MALICIOUS

PDF

36.3 KB Created: 2020-10-18 23:23:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 0a57238148c8ed3a7cfd60668001166a SHA-1: 75f18be966c98e5f179af14a3755bef94352b891 SHA-256: 45d12be7973873dac369b56706c7885c8b5808b9c6837c91e5cbbf43bf5830de
194 Risk Score

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://gettraff.ru/123?keyword=cooper+model+dpp400w+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368971/normal_5f899fc2eefa7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375699/normal_5f8c5397b3499.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374373/normal_5f8a19c2d0345.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375698/normal_5f8af090dc84e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380539/normal_5f8c1d70b5f9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379855/normal_5f8a8963bf043.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371799/normal_5f8bf1e796368.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/1/0436/5330/0377/files/88387456875.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2219/5607/files/operaciones_con_numeros_racionales_e_irracionales_ejercicios_resueltos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7297/8585/files/christen_limbaugh_bloom_wikipedia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6996/7013/files/breast_screening_guidelines_us.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/6080/4770/files/initial_counseling_example_for_platoon_sergeant.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2788/9319/files/mobil_1_5w-20_motor_oil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/2785/8076/files/tercera_ley_de_newton_ejemplos_en_la_vida_cotidiana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9298/2427/files/richard_kearney_strangers_gods_and_monsters.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4628/1122/files/norah_jones_sunrise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9586/0411/files/doctor_who_donnas_dad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7b97c44-1d34-4b8d-87f2-7c7e6eb7b5cd/lekegokuzotofidagaja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ef57a32-4958-483a-91ef-9c2024a36001/63991794236.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E78 5156 bytes
SHA-256: ae9541957faf9ce19b9163697ba886b198e4147ba979203337a2b4e60f651127
font_01_sfnt_off00005ffe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FFE 10656 bytes
SHA-256: 90e827c8839dcc93a9185e5e5a2a44271a99a3ef110bd13c90832cf2e63b93f6