Malicious PDF — malware analysis report

Static analysis result for SHA-256 b39a6b3f1cf18ae1…

MALICIOUS

PDF

40.9 KB Created: 2020-11-05 11:39:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: cd92fff3518f7e482963afd5ecf1a3aa SHA-1: d4c89a9c4353550c5f814ac16c9d7f2627c3f2a4 SHA-256: b39a6b3f1cf18ae1187cb82efa43bc8b05320080a442f8bd18f931e000c2595c
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, ggtraff.ru, which is presented as a download for 'apk nba 2k14 pc'. This indicates a phishing attempt to trick users into downloading potentially harmful software. The ML classifier also strongly flagged this PDF as malicious.

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://ggtraff.ru/strik?keyword=download+apk+nba+2k14+pc In PDF document text
    • https://cdn-cms.f-static.net/uploads/4416665/normal_5f95dbc0871c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369174/normal_5fa33306dc1a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420604/normal_5fa12543f3874.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372072/normal_5f8b4a8b9ac97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380380/normal_5fa36a59e497a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388067/normal_5f8ebb46a655b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367665/normal_5f8d42e2ca022.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/a9e3fb04-cb6a-4731-b250-8bd0dac8ad7f/fodugipuberodonotaxenofa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/958b926d-5705-4750-af4b-ffb9925fe820/butiruvazutapowug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a036c86-f026-4756-b68c-69fab7360bab/michael_lloyd_md_hanford_ca.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66ad66bf-8479-4254-81d0-13fdbb106796/39653685893.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a020e23-c08e-43a5-b493-70e2ada2d292/sony_nex_c3_manual.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_off00006095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6095 5360 bytes
SHA-256: ae83743b447491e92c354ca6f4d4b201fa1f43a11b1d928ac9dda04c72b17893
font_01_sfnt_off00007306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7306 10516 bytes
SHA-256: 7fe9ebed3e8e5f7951e82dcc2353c69aef96fb2e875166c31431f660152f050a