Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab18cfd105c8031c…

MALICIOUS

PDF

76.4 KB Created: 2021-01-01 13:13:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2345812d0b893346b6f0d4fe1b5fb14c SHA-1: 1047390248b364bb410454b12eae1f83aefd99e1 SHA-256: ab18cfd105c8031ccc3b72c9db0ba09ff4947cb2951027b5a96e7752d7d3bac4
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'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL indicates an attempt to lure the user to a compromised site, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ggtraff.ru/123?utm_term=certified+paralegal+review+manual
    • https://cdn.sqhk.co/rijakobebux/cjjnjbU/likifuvuxusamajutab.pdf
    • https://cdn-cms.f-static.net/uploads/4465012/normal_5fb641daa55d4.pdf
    • https://cdn.sqhk.co/kurotevu/iaBshae/85441417584.pdf
    • https://cdn.sqhk.co/ruxuvedije/hcsRih8/c64_emulator_games_free_download.pdf
    • https://cdn-cms.f-static.net/uploads/4447914/normal_5fbd728baa107.pdf
    • https://cdn.sqhk.co/lasesekov/gd67a4t/72608604664.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jemisajoda/35344110306.pdf
    • https://s3.amazonaws.com/dakebesuvum/aeronautical_charts_for_google_earth.pdf
    • https://s3.amazonaws.com/bajapovogam/can_t_factory_reset_android_box.pdf
    • https://s3.amazonaws.com/jeduzizonox/fareraraka.pdf
    • https://s3.amazonaws.com/vuxalirudidel/geometric_series_worksheet_answers.pdf
    • https://s3.amazonaws.com/woberiz/zagojejuxuseguwiwun.pdf
    • https://s3.amazonaws.com/bojafazes/86402418366.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd95.bin
63584545090f0e179ab693d5f071343df2251b9f969736e12fa3ca11c51be176
pdf-font-stream PDF embedded font (sfnt) at offset 0xCD95 5240 bytes
font_01_sfnt_off0000df68.bin
7918844545ab8ceca6e28a8fa11591f64ea83bd6da4bf5d8b5bca43f53835956
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF68 10708 bytes
font_02_sfnt_off00010449.bin
524ff10462cdc14e0c917943c0bf10c712711241ddc4c349b41ae14f464eee82
pdf-font-stream PDF embedded font (sfnt) at offset 0x10449 18824 bytes