Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4fc6826ff9d1b48…

MALICIOUS

PDF

42.0 KB Created: 2020-09-30 17:01:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf019f085f8ad3a650ef27dc277c5a6e SHA-1: 4907417d13a7ed8643c34b2cb345a79b383f241b SHA-256: c4fc6826ff9d1b4833a1024b0fc94dfe66ea4f2f8a57de29fd41e0d445857494
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, https://gettraff.ru/strik?keyword=verbal+ability+pdf+for+gate, is the primary indicator of malicious intent. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of malicious URLs suggests a phishing or malware distribution attempt.

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/strik?keyword=verbal+ability+pdf+for+gate
    • https://site-1037273.mozfiles.com/files/1037273/lonisamabivinejisepubez.pdf
    • https://site-1037129.mozfiles.com/files/1037129/20351233776.pdf
    • https://site-1036807.mozfiles.com/files/1036807/jujegev.pdf
    • https://site-1036965.mozfiles.com/files/1036965/25277805666.pdf
    • https://site-1036722.mozfiles.com/files/1036722/penodo.pdf
    • http://sefov.henleychocolates.co.uk/uploads/1/3/0/7/130738902/giratotutaxo.pdf
    • http://zexud.badgirls.hu/uploads/1/3/0/9/130969336/258380.pdf
    • http://files.marinaredlich.com/uploads/1/3/0/9/130969598/fc2135835.pdf
    • http://zususezow.lbksupersr.com/uploads/1/3/1/4/131407406/0219f763c41.pdf
    • https://site-1037028.mozfiles.com/files/1037028/favugupirisubos.pdf
    • https://site-1036980.mozfiles.com/files/1036980/91279043952.pdf
    • https://site-1037035.mozfiles.com/files/1037035/21535077291.pdf
    • https://site-1036907.mozfiles.com/files/1036907/79189159525.pdf
    • https://site-1037160.mozfiles.com/files/1037160/govituzokuve.pdf
    • https://cdn.shopify.com/s/files/1/0468/8517/5453/files/basha_songs_masstamilan.pdf
    • https://cdn.shopify.com/s/files/1/0482/1116/5336/files/xivizavoxomuvivivin.pdf
    • https://cdn.shopify.com/s/files/1/0437/1765/6728/files/fokovowuzusolobuxa.pdf
    • https://cdn.shopify.com/s/files/1/0430/3201/9097/files/date_sheet_of_10th_class_2020.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066a3.bin
696e8958dce6db202cbbb6489db640add0506796180c7a27e5ec19f41001c05a
pdf-font-stream PDF embedded font (sfnt) at offset 0x66A3 5236 bytes
font_01_sfnt_off0000788f.bin
2f386e26567589d3e7c67d0690153c47c5ce357ff08692199c31658cd39c7257
pdf-font-stream PDF embedded font (sfnt) at offset 0x788F 10124 bytes