Malicious PDF — malware analysis report

Static analysis result for SHA-256 175ecd807f10ebde…

MALICIOUS

PDF

51.4 KB Created: 2020-10-29 05:50:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 5e7e5c35b10245b63b95105b14accef7 SHA-1: 696c47c18380c95241486941041d843f0a6e967b SHA-256: 175ecd807f10ebde0ec0d5f02f4c7f373c751dab03a2b090e8edf80e8dea4766
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a significant number of embedded links, with many pointing to disposable hosting or redirector infrastructure, indicating a link farm or SEO manipulation tactic. One URL, https://gettraff.ru/strik?keyword=rapunzel%2527s+revenge+graphic+novel+pdf, is flagged as a malicious redirector. While no scripts were extracted, the PDF structure and link farm heuristics suggest an attempt to lure users to malicious sites or manipulate search engine results.

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.
  • 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.
  • 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/strik?keyword=rapunzel%2527s+revenge+graphic+novel+pdf In PDF document text
    • https://suleduzon.weebly.com/uploads/1/3/4/4/134403341/d9d2707ea4df.pdfIn PDF document text
    • https://pibazafefudo.weebly.com/uploads/1/3/0/7/130776509/af108.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403429/normal_5f9a362cf3f06.pdfIn PDF document text
    • https://tijikazi.weebly.com/uploads/1/3/4/3/134373218/danonu.pdfIn PDF document text
    • https://xonidaxu.weebly.com/uploads/1/3/4/3/134319292/baeedaf66642d.pdfIn PDF document text
    • https://pezopipowom.weebly.com/uploads/1/3/1/4/131406060/5351011.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386593/normal_5f98d4591802e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413019/normal_5f96cd03a743c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ac8fcb9-a293-4f7f-8f65-6413cbdaba8a/49673107258.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ef0dec5-06aa-46a9-b0e0-13debea35249/xebex_air_bike_price.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2846/2233/files/duke_act_scores_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fdef842-0914-480e-a289-0225f320658b/advanced_mathematics_precalculus_textbook_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14f84ed7-7836-4aed-8227-a84be4643df8/gogixakewisejugomupojo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a93296a-564f-46d5-b189-255df0f959db/logiwetoxixaseminofaxebud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a51d92e8-11ae-4a57-ac9f-6cdeaa228ba6/99618746655.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03d559b6-a9af-4ce4-be75-6babe5de4d5b/lodovexemon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/7572/9056/files/jitutawitusokediwawe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0613/8787/files/kabbalah_hermtica_marcelo_del_debbio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04169f61-a6d6-4e37-aac2-41ccf017860b/fijonasejifokidurinu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/166df87f-2740-4b65-b767-2e71011a6667/movies_and_meaning_an_introduction_to_film.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25fa72be-5939-4f4e-8973-80308ed1129b/unlisted_watch_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/944150a6-bd54-4dd9-8eb4-25ecf038543c/cappello_uncinetto_uomo_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5806/8136/files/the_subject_matter_of_ethics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8763/2813/files/a_raisin_in_the_sun_2008_wiki.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_off000088fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88FC 5568 bytes
SHA-256: 6d123345060949abd5698e23bde0ef7bbeb8801ee72f7b69404607d78c2f3549
font_01_sfnt_off00009c07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C07 10548 bytes
SHA-256: c605ff5f4657d94983bd8f14e8f17289faa9d4691c3eb949ffc9d8dfa543c7c3

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