Malicious PDF — malware analysis report

Static analysis result for SHA-256 e16a8aeeae925440…

MALICIOUS

PDF

37.2 KB Created: 2020-10-01 05:26:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 3c6c211387f368f7e1e282c656082676 SHA-1: 734afa6279499b49a5feaaa3ba72184e1815e95f SHA-256: e16a8aeeae925440e4589e5dafcaa9aec50d2bd54d22e225b90f3c759314d679
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the PDF is designed to redirect users to potentially harmful websites, likely for SEO spam or phishing purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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://cctraff.ru/strik?keyword=cure+rheumatoid+arthritis+with+diet+pdf In PDF document text
    • http://bovutele.rockriverreview.com/uploads/1/3/2/7/132712615/2642460.pdfIn PDF document text
    • http://wokukazad.uuvc.org/uploads/1/3/0/8/130814328/tofuma-nikiwolepisolov.pdfIn PDF document text
    • http://files.hugreece.com/uploads/1/3/0/7/130775528/zegogumufit-warobeguzuxuliz-tofadamaduked-wofajamiwu.pdfIn PDF document text
    • http://files.larryweingarten.com/uploads/1/3/2/6/132695336/xutizevolofasesuxol.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/e0290898-9e33-428e-83e8-e00e3a96cfc2/lapol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89d4e584-c1bb-472d-a6f5-ec2d88b0ea1d/97394870942.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df4aa075-e459-4fcf-899a-f6f3bf37fc3c/wenegoxalukedefuvu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/474f38dd-1a3b-4a91-9b29-ff7b79aeb4d7/84036743616.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6146/9596/files/70101500338.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/7827/0375/files/yamaha_blaster_200_performance_parts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9602/2933/files/gokatabixilulaje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2f72c4f-48e6-4779-8630-618d9028e155/xonerinefidepugovifemep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c01f988-e0ff-4429-b715-1c754faf9437/ramexidikoditibanif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8448fd3e-192c-4e19-b077-b2ff5d7abc6b/41817957069.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93675963-aee9-431a-b3c0-54195dba8a44/21202018481.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/756a66e3-9729-4a41-8bbf-18ad4b176be6/12694446043.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_off000053d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53D0 5248 bytes
SHA-256: 26530f129f3ee8ae9d46ff5be6b34264030412af73ec190814d043003836f6aa
font_01_sfnt_off0000658c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x658C 10068 bytes
SHA-256: 13de5231e21ceb6a5ac84607732a2cc70d7b15a7a6ca6fa0a085587eb107f065

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