Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5aaeb82ed0ed9c4…

MALICIOUS

PDF

42.9 KB Created: 2020-11-03 10:28:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 191d994d217df5ebde92d5ca0ebdda16 SHA-1: bc59dd84df738151cff727aa94c9afca707e6dfe SHA-256: c5aaeb82ed0ed9c4bda5409f82b6fd7dde8f205712a04a5d101243b2a551eec6
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 points to 'ggtraff.ru', which is associated with malicious activity. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to trick the user into clicking it. No scripts were extracted, but the presence of malicious links is sufficient evidence for this assessment.

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=frontier+white+pages+rochester+new+york In PDF document text
    • https://sasakafu.weebly.com/uploads/1/3/4/3/134371045/pevitazarorad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365576/normal_5f89cf9475859.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378845/normal_5f8a3e71598f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371524/normal_5f8b754483e0e.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/7db61b43-e9a4-4360-a8e5-1333971db6ce/wodifupesevupaxilizuluk.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/chinese_food_menu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5a78c6e-de4a-4899-ac49-82a71c627b3d/jitifotovisidozile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7c740c8-fb3b-4b17-bec8-1603d4cc05b2/50286230188.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45dd8aef-0db0-4cd7-905e-368032c1b516/74062705043.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8aa96e6f-548e-4cca-8fc3-679735577827/98597611205.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81584797-e54b-4e5d-80ee-901b5794ed21/operaes_farmaceuticas_o_que.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_off00006533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6533 5376 bytes
SHA-256: 243ac177c26f729ae7a0defab9106810535e9eab033c8b46e2050fb63667c905
font_01_sfnt_off00007799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7799 11060 bytes
SHA-256: 61360cae05c0b579769a68bccf15c72769d7c72cd5202ef9477142c6e405c853