Malicious PDF — malware analysis report

Static analysis result for SHA-256 37637b97937b4280…

MALICIOUS

PDF

79.3 KB Created: 2020-12-16 14:36:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d6b901ffb3e5f7a95427c1371b79960 SHA-1: ca4983f284435ed44faa7d826778f54d8c61fa3f SHA-256: 37637b97937b428006dd6347e1deee811e55097145a3b891b4a4836625aa25b2
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 'https://gettraff.ru/123?utm_term=the+lost+book+of+remedies+ebook'. 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, disguised as an ebook, indicates a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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?utm_term=the+lost+book+of+remedies+ebook
    • https://cdn-cms.f-static.net/uploads/4372355/normal_5f89382f364c9.pdf
    • https://cdn-cms.f-static.net/uploads/4372086/normal_5fb49f341c79b.pdf
    • https://cdn-cms.f-static.net/uploads/4444377/normal_5fd66e32758b9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4d38927c-2a4c-4da7-af4e-79123eb9a78d/nizunajomuxaxofuma.pdf
    • https://uploads.strikinglycdn.com/files/b15f2f66-8d59-4cd4-8c39-0751fb6e0882/45837691511.pdf
    • https://uploads.strikinglycdn.com/files/fb829cc7-4e73-4b66-9c4c-07d0030c8c3b/bikini_see_through.pdf
    • https://s3.amazonaws.com/potofaw/types_of_soil_worksheets_for_grade_2.pdf
    • https://static1.squarespace.com/static/5fc7a864fa9ecc3978a0c3e8/t/5fcaac9cf7d8747e17da0f05/1607117982824/smart_launcher_3_pro_apk_revdl.pdf
    • https://uploads.strikinglycdn.com/files/03be35b0-c8f4-47a4-825e-603f106a4211/nbr_14606.pdf
    • https://uploads.strikinglycdn.com/files/bb48b6d7-ab40-481f-917e-e0c984250c31/cinema_53_davenport_iowa_showtimes.pdf
    • https://uploads.strikinglycdn.com/files/bd220ae9-7ce8-4b73-9331-cba5f8112f28/jutotereforo.pdf
    • https://static1.squarespace.com/static/5fc1583bff13940aa242bd98/t/5fcfe6fc6dbb620f3b548b12/1607460605803/galactic_thunder_action_arcade_shooters.pdf
    • https://uploads.strikinglycdn.com/files/99198e32-4fe8-4cb3-ae55-69b1deb343d4/48995983588.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2c0.bin
42a9bb300490728e086a19e31d98ff9924dd7848b7d0346f0584aeb995882a70		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2C0 5088 bytes
font_01_sfnt_off0000e3db.bin
bc55f3fcd024667a38aba298877687034fab8713f80e80cd910db4028600ca52		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DB 3588 bytes
font_02_sfnt_off0000f20f.bin
61e4eac5ed7e91118424b9c211c0ddfbb519e5022d51e3278b4eb09508964369		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF20F 11308 bytes
font_03_sfnt_off000118dd.bin
4b52fd5da643d9c08cc0a86f773b2f024e3274f3f861dfcac100db1ef433cf06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118DD 16164 bytes

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