Malicious PDF — malware analysis report

Static analysis result for SHA-256 6abeb46a1f7e6a4d…

MALICIOUS

PDF

47.0 KB Created: 2020-10-20 10:20:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: e7850e3dcc759244bd46dbc961751742 SHA-1: 904c030624264da6ae22b496cdb55b25c1bea340 SHA-256: 6abeb46a1f7e6a4de2844e7801db03973a576a6d388bf16d6dc42ba19ba32ed2
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, identified as a link farm. One of these links, https://gettraff.ru/123?keyword=doncaster+rovers+stadium+guide, is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document's primary function appears to be directing users to external, potentially malicious, content.

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/123?keyword=doncaster+rovers+stadium+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366057/normal_5f8cb7f1930b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384318/normal_5f8d615c96084.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369797/normal_5f89907ee3fd1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366358/normal_5f8729949dc3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370284/normal_5f8e899060456.pdfIn PDF document text
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/8571898.pdfIn PDF document text
    • https://rolosakuzorega.weebly.com/uploads/1/3/1/3/131379035/7a015d.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/ratot_muweliwamopoj.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/bagatazojiz_sidatasofugugor_sofaxazute_gureluf.pdfIn PDF document text
    • https://barofabilis.weebly.com/uploads/1/3/2/7/132712093/3e29cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369322/normal_5f884c26a8e88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366628/normal_5f8d5ff956cd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369522/normal_5f88c30a27c4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365639/normal_5f88da4eb9052.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376869/normal_5f8e6d2313b8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382189/normal_5f8c683a52cac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365594/normal_5f8c0bedbf20e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366620/normal_5f8e87b71d56b.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/17d7fc26-0642-4393-a7e8-638ff63601ab/zokulajatalejabe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81d30206-6a49-4cf9-a88c-bdf359599196/46310694949.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3745/7575/files/basic_engineering_circuit_analysis_11th_solution.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/4101/9844/files/download_youtube_video_apkpure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3000/1302/files/64760813544.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0458/9774/4538/files/xukon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1895/1576/files/how_to_use_kreg_micro_pocket_drill_guide.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_off00007af4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF4 5288 bytes
SHA-256: 06e2e88505759e687ed5c9427abb6c1d25afaaa70a77051c114b61c42516be32
font_01_sfnt_off00008cda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CDA 9852 bytes
SHA-256: 79bb3fb2699d5e403002be0be0ea9ac180c66cb3fde9a42ceee0c1f2a13a5ded