Malicious PDF — malware analysis report

Static analysis result for SHA-256 086a722394f24285…

MALICIOUS

PDF

84.3 KB Created: 2020-11-25 05:14:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 3655c3c34c023433c8c7e8cf535f7ec0 SHA-1: 234753a3a528662837503a8060f68aab2f4d02ec SHA-256: 086a722394f2428514b0bacd396e521cd1b8cb1609450391262c1b7cf03707e5
96 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying a link farm pattern. One prominent external URI, 'https://trafffi.ru/strik?utm_term=la+luna+sangre+october+3+2019', is flagged as suspicious. While no scripts were explicitly extracted, the PDF structure and the presence of embedded URIs suggest an attempt to redirect users to malicious content, likely as part of a phishing or malware delivery scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/strik?utm_term=la+luna+sangre+october+3+2019 PDF link annotation
    • https://kaxobemux.weebly.com/uploads/1/3/4/6/134676595/05f809d9564b332.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367927/normal_5f941bb7cf661.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418796/normal_5faeecdc853ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368752/normal_5f925f6261112.pdfIn PDF document text
    • https://boburebapexew.weebly.com/uploads/1/3/4/5/134597485/bodefuwikix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407302/normal_5f992d43c8fd2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rotowan/dreamweaver_quiz_2_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/z71_decals_stickers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d082e508-96e5-4098-8906-9dcf063fc557/royal_envoy_2_level_33.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/kugulilow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c672ea7-4b93-4faf-b89f-4f4b408862c9/knex_screamin_serpent_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/alchemy_stone_guide_bdo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87d0465d-e5f5-43c9-b006-72046ac2868a/21008928470.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_off00010ad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD8 5696 bytes
SHA-256: c97a0c5c5a55d2dcf26c6cc4ab1d6b9e6617004238f47a35a51b026c1f7608cf
font_01_sfnt_off00011e46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E46 11504 bytes
SHA-256: 9d861eceb7956c3fa221c832402519bacac6adffadf1330e5cf445f51bfec299

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