Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e2affcf821295ac…

MALICIOUS

PDF

71.2 KB Created: 2020-12-21 04:44:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 95a375a4347e290a26b253918836999f SHA-1: 19ce3a80b3decc089e3aee3831184a1052ce92ac SHA-256: 4e2affcf821295ac6d9ddbe729a32bd11453d9d892f4edc3c320a8d14a8fba64
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/strik?utm_term=year+of+the+rabbit+season+2+air+date'. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the nature of the redirector suggests an attempt to lure the user to a malicious site, likely for phishing or to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gettraff.ru/strik?utm_term=year+of+the+rabbit+season+2+air+date In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365635/normal_5f8a1692c1dae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365536/normal_5f89c6c76c2fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370989/normal_5fadbed521f14.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://s3.amazonaws.com/difigomisosak/spanglish_subtitles_english.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/lusetidexogonumimam.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/vunerenegekijominovonovo.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/62448349162.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc55f6d5bcb0228a2a0640f/t/5fccc94ed336b863f0c017ec/1607256399390/14971456914.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/bicameral_and_unicameral_legislature.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/aluminium_anodising_process.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf2205147b14804f7fd81/1606283810895/chess_knight_moves.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/96112535527.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdf17990172f85bb32cf94c/t/5fdfb9bf7514fb3b76633808/1608497599686/wavofigezerawomexi.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/97082129880.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_off0000ccb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCB7 4984 bytes
SHA-256: 643da16bf5075e81c2afb5469eae4767555a67be99c3b2126a12bba271e12148
font_01_sfnt_off0000dd99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD99 10628 bytes
SHA-256: 19a9e32c620bd5385892b451a59c18ebbaec1b9904bd3fbfaa3d75acc2c45c18
font_02_sfnt_off00010203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10203 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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