Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1ebbab73356111e…

MALICIOUS

PDF

66.8 KB Created: 2020-11-19 09:14:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e520eefbec9c414ee217e316a0bdae0b SHA-1: 75fd78bf7762eeaa1d65204221e8aa5523ab63fb SHA-256: c1ebbab73356111ecec09ad22ffb25168b9bf3d04f21fb934e70228bfb804136
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL 'https://ggtraff.ru/123?utm_term=aca+laundry+list+workbook+pdf' is the primary indicator of this malicious redirection. While no scripts were explicitly extracted, the nature of PDF redirects often involves embedded JavaScript to facilitate the redirection, hence the inclusion of T1059.007.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ggtraff.ru/123?utm_term=aca+laundry+list+workbook+pdf
    • https://cdn-cms.f-static.net/uploads/4460723/normal_5fa8bb14e3247.pdf
    • https://cdn-cms.f-static.net/uploads/4420592/normal_5fa4b81de21f9.pdf
    • https://cdn-cms.f-static.net/uploads/4447464/normal_5fa14d6e2cdff.pdf
    • https://cdn-cms.f-static.net/uploads/4370985/normal_5fa00d48b40e3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/623fc12a-b0af-4603-a308-68ac2f88f22f/40110313379.pdf
    • https://uploads.strikinglycdn.com/files/2b115ad1-5744-432f-8166-76154d22ccb0/36528158104.pdf
    • https://uploads.strikinglycdn.com/files/4cde7ac6-d70f-4fc4-826e-aaa6d203bc2a/cpo_khaki_uniform.pdf
    • https://uploads.strikinglycdn.com/files/a4941ca1-e66a-4f9c-b838-883b51a6e9d8/94275863441.pdf
    • https://uploads.strikinglycdn.com/files/bb105989-37a9-4ab4-b4ae-7ebeaa2b5be9/fast_and_furious_7_720p_dual_audio_free_download.pdf
    • https://s3.amazonaws.com/buxoparadazegu/sugajawipomafak.pdf
    • https://s3.amazonaws.com/jamokaroxoj/what_do_you_do_at_a_candlelight_vigil.pdf
    • https://uploads.strikinglycdn.com/files/bc6c5d04-3e45-4484-9415-504417baddf7/35564002027.pdf
    • https://uploads.strikinglycdn.com/files/db051c44-ad5b-4fb7-8e6f-ca022d89a103/toni_morrison_jazz_novel.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6de.bin
f699477a21d0f4884003c108ffee8cbd2ad6c8750c4aff0bb75c9c76188d2487
pdf-font-stream PDF embedded font (sfnt) at offset 0xC6DE 5536 bytes
font_01_sfnt_off0000d9d9.bin
66b77047ff0834c3d15e59a3d47a5c336ea2f91fb1ee8463df13b60880e73949
pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D9 10716 bytes