Malicious PDF — malware analysis report

Static analysis result for SHA-256 e254a4b39426a966…

MALICIOUS

PDF

41.2 KB Created: 2020-11-04 07:17:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 93c95c2016b8d6b16b6f085612363c32 SHA-1: 238b0f6ea69ebe0c69ce2d0c65dcfa5c4f487f89 SHA-256: e254a4b39426a9667b5f72b75e50db8cd600b28c41ba7bd537e585aebf32ff1d
94 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ggtraff.ru/wb?keyword=obama%20declares%20emergency%20swine%20flu'. The document body also contains this URL, indicating an attempt to lure the user to a potentially harmful website. 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/wb?keyword=obama%20declares%20emergency%20swine%20flu In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383321/normal_5f91620cc6246.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381964/normal_5f90b119b2b23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372101/normal_5f8cc93c5bdb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366637/normal_5f8b6eae817d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404124/normal_5f93d3055db6c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/3181278923.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/fujenemegisagibuwola.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/22568959320.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/environmental_determinism_ap_human_geography.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/runozagiseza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/683e8708-99c8-49a5-a1d7-619522473c36/yamunai_aatrile_96_song_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/857275565.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/mideme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b20839e-0ef0-4f53-800c-6ecccb5bad50/podom.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/brahmanda_puranam_in_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/vepagalaraxezexudorel.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/65621433675.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_off00005ed7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED7 5704 bytes
SHA-256: b93512a713fed56dafa5459d97ea937d1f3f800d850ea20304ed7178a83aa643
font_01_sfnt_off00007234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7234 10916 bytes
SHA-256: 22fe8621e82bacf7d184f4cd69e3f026627b48e11271de7b86feabe3a6681e1b

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