Malicious PDF — malware analysis report

Static analysis result for SHA-256 544871dea55da009…

MALICIOUS

PDF

95.5 KB Created: 2020-12-01 10:54:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 6192575dfe4bc8a9a0474b1b639c6b14 SHA-1: acbbed9041ed4647d0b9b0e5535e67f1319cd275 SHA-256: 544871dea55da0098c08bf74dac280efffba88620b471ccf7e285c59a9309118
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 an attempt to lure the user to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the redirector suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/123?utm_term=mental+math+practice+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4486963/normal_5fb35a6e29c59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366024/normal_5f968a1bd4101.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384159/normal_5f8e0bbfbd471.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393624/normal_5f91c4c13fbc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415068/normal_5f96951cb5341.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379377/normal_5f8be0bdec07b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4985e18c5c478ef1f2fb/1606371717873/cricut_easypress_mini_near_me.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe0d3ae18c5c478ec31c45/1606290746985/britax_marathon_70.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf8718bc8713fe6fd5bd3/1606219889922/zebolenilabapinej.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf04d61e25426e1fdf71b/1606283341830/4138078571.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10afc403f5353fd968892/t/5fc14bfd3570fb44d132a156/1606503427649/daraponopakenibefog.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd1cb65dd8cf232ed294b1/1606229177243/compiler_construction_principles_and_practice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30088feb-3461-4b6b-aa1e-2906d089d37f/roboxoxupozu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0eac55bcb0228a2828fa5/t/5fc1f26a2dd96f59183481e7/1606546026769/mount_olive_appleton_facebook.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe1b86173fb5383b6a81e1/1606294414806/how_to_write_an_autoethnography_proposal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/befde422-ce98-4513-bcdf-1901a18d2728/wofekofi.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D87 3496 bytes
SHA-256: e36ad39fea6692b416507b102132f2c2ca7d5a9c6c91037c31866f06083a481d
font_01_sfnt_off00011a03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A03 5220 bytes
SHA-256: db06cc0ef5c474ba21bd4434aab59bacb4d4c1dc7f9e69e3f770c75fcb34ee5e
font_02_sfnt_off00012ba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BA8 11152 bytes
SHA-256: ef5226c737446abe8aabbd8e32c2a12b51e74e59c3cf30a5a87b57af5091ea3f
font_03_sfnt_off000151b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151B4 19484 bytes
SHA-256: dc66867495eeb1c93e441ecde4de6bea5c00f9099744775ce1a632bbe4a14d68

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