Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a78d88c987609d1…

MALICIOUS

PDF

31.3 KB Created: 2020-10-29 21:47:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: e3af068aaf419f7f372003e11bddf9f0 SHA-1: 2bdf56792a2038ea1fce5de2f99e4b7f4b2db897 SHA-256: 3a78d88c987609d1b2fed0dd4a0091978bd03414a49e0396aa67424765240a56
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is disguised as a 'Japanese slot machine manual'. The ML classifier also strongly flagged this PDF as malicious. The embedded URL is the primary indicator of malicious intent, likely leading to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=japanese+slot+machine+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4402718/normal_5f98b05842af5.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/1/0436/2846/2240/files/6222573911.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd45f937-3d8a-4094-8e08-a77114c36471/craftsman_weedwacker_17_25cc_gas_line_trimmer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bade752-2bbf-4fb1-acb5-7737ed471886/sigafuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3128/8734/files/80485438212.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86d4b7af-d7aa-4ea2-9a4e-b15e1d115c5c/dancing_at_the_blue_iguana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/938e0434-1ee0-4409-b8c1-d253cbc756ef/icono_pokemon_go.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9148/7640/files/area_and_volume_of_pyramids_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8709/4461/files/nikofip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7280/7610/files/bezal.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_off00003fa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3FA0 5064 bytes
SHA-256: f4e37f59342e5b23a20c41eddfaaa2db11f9350aac56bc5f58e829843c75d918
font_01_sfnt_off000050b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50B2 9444 bytes
SHA-256: 179fdbf65f07aa8b85e71fd48c89e599465acdb083dda92e1f68754c4928bf3b