Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d05aded43201a20…

MALICIOUS

PDF

45.3 KB Created: 2020-10-31 01:11:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b2c0325e93ec114bf657400ff91c1f60 SHA-1: 739d4e13b32878d57929519b4443beb6b2cead19 SHA-256: 1d05aded43201a206c04601befa362aa1aa6991270069211ec8887ac17c0f834
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link to 'https://gettraff.ru/123?keyword=shurflo+rv+water+pump+pressure+switch'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL within the document body suggests an attempt to lure the user to a compromised 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://gettraff.ru/123?keyword=shurflo+rv+water+pump+pressure+switch
    • https://cdn-cms.f-static.net/uploads/4366653/normal_5f876a7594e47.pdf
    • https://cdn-cms.f-static.net/uploads/4390055/normal_5f90e6bfdd0ea.pdf
    • https://cdn-cms.f-static.net/uploads/4370555/normal_5f8a572b3c87d.pdf
    • https://cdn-cms.f-static.net/uploads/4365655/normal_5f87234eb2732.pdf
    • https://cdn-cms.f-static.net/uploads/4379605/normal_5f939e90d2a90.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0a287a3a-0cac-4413-b0cb-17e0ff2a3e0d/saxejupajo.pdf
    • https://s3.amazonaws.com/gurowozenupifi/download_gta_5_mobile_apk_android_1.pdf
    • https://s3.amazonaws.com/vuforewebub/lolifixafukalofebuxune.pdf
    • https://s3.amazonaws.com/mejigavukolu/empirical_distribution.pdf
    • https://uploads.strikinglycdn.com/files/a74ff1bf-0097-4c72-a3cc-f4409c08ff94/vubowapatezomelosujus.pdf
    • https://s3.amazonaws.com/lefemijip/detailed_engineering_design_instrumentation.pdf
    • https://s3.amazonaws.com/kavitokolezub/tulixebokadakuk.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_off00007280.bin
78b81c90f31cfd20175e94b99ad8c5e7c3973535eb4ddfa409b60d1ec66042a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7280 5508 bytes
font_01_sfnt_off00008527.bin
68bdf7d716e0ddc0e684355eaa7904db924883e71e0e594f5bce6102f003486d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8527 10384 bytes

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