Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9d87e4a3397945b…

MALICIOUS

PDF

70.4 KB Created: 2021-01-05 04:59:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: df46dd6c99473596f077418ad330932b SHA-1: d0cff836dfbc1fc912fbd925647968b40dedbd0d SHA-256: a9d87e4a3397945b60ed167e5d662b80726a12ec8fe714f851377e92821aa893
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. This indicates the document's primary purpose is to lure users to a potentially harmful external site. While no scripts were extracted, the ML classifier and ClamAV detection strongly support a malicious classification. The embedded URL is the highest priority IOC.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/aws?utm_term=aide-+m%25C3%25A9moire+macro%25C3%25A9conomie+pdf+gratuit In PDF document text
    • https://cdn-cms.f-static.net/uploads/4450506/normal_5fa2398cb2698.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408346/normal_5fda76c585977.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499319/normal_5fc9e9007ebee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446379/normal_5fa704ae79dc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372080/normal_5f896bb959bf6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/55b3962e-5fcd-499d-ab30-c94eade86819/comic_reader_android_apps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67c0c935-8013-4dba-a9a0-9cdb9b8a87eb/bubble_shooter_game_free_download_full_version.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/new_bollywood_movie_2019_mkv.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/acacia_ridge_state_school_uniform.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/21286657267.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/deskripsi_bayam_merah.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/archeage_builds_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40ce298e-a625-44a5-b7cf-5e17ce76ce48/shuushar_the_awakened.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/63331928724.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6D1 5308 bytes
SHA-256: 0d2586e34d61512c3a779fe7f3fd5c654ff3491d8cb67d677c37e12762830109
font_01_sfnt_off0000d883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD883 11192 bytes
SHA-256: f856be524baf11c0875751c2bd123b16524cd1da82b6965284740a6f455ebc8b
font_02_sfnt_off0000fca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA7 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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