Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8c3a77011def71e…

MALICIOUS

PDF

68.7 KB Created: 2021-01-11 18:01:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26c3f63a5dbc56299278e16b1aa1c695 SHA-1: edf014a09a52e7d1c4e0dd4b346dfcf55042ec5a SHA-256: c8c3a77011def71e955bb4f3197925d053ea0c04d5193fcc8d182cb1d590c951
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF containing a malicious redirector link to 'https://gettraff.ru/123?utm_term=do+it+again+lyrics+travis+greene'. ClamAV and an ML classifier also flagged this PDF as malicious, specifically identifying it as a phishing trojan. The presence of embedded URLs and the critical heuristic firing strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=do+it+again+lyrics+travis+greene
    • https://cdn-cms.f-static.net/uploads/4421360/normal_5f9b751905080.pdf
    • https://cdn-cms.f-static.net/uploads/4368489/normal_5f88aea95fbb5.pdf
    • https://cdn-cms.f-static.net/uploads/4408177/normal_5fd124a48b5b8.pdf
    • https://cdn-cms.f-static.net/uploads/4403262/normal_5f91fd0f84ee9.pdf
    • https://cdn-cms.f-static.net/uploads/4366351/normal_5fad8db67f59e.pdf
    • https://static.s123-cdn-static.com/uploads/4385869/normal_5fc9c7a870eea.pdf
    • https://static.s123-cdn-static.com/uploads/4410730/normal_5fef395299c22.pdf
    • https://site-1180061.mozfiles.com/files/1180061/breakinglands_heroes_download.pdf
    • https://cdn-cms.f-static.net/uploads/4484358/normal_5fb42bab618ec.pdf
    • https://site-1166673.mozfiles.com/files/1166673/vobeterasuvudajovozen.pdf
    • https://site-1168374.mozfiles.com/files/1168374/40266725735.pdf
    • https://site-1173463.mozfiles.com/files/1173463/10632619372.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/liluvad/pivikefutajalozo.pdf
    • https://s3.amazonaws.com/bulolimepol/bozolom.pdf
    • https://s3.amazonaws.com/vuforewebub/aarambam_video_songs_mp4_free.pdf
    • https://s3.amazonaws.com/bajapovogam/33223494361.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d007.bin
b7468f8c4f2b50e6fc7b5429134124acb7ce9bacbe404d738cf836ffa20a13f6
pdf-font-stream PDF embedded font (sfnt) at offset 0xD007 5128 bytes
font_01_sfnt_off0000e1a2.bin
e12cc52e4cb41cbf120c70e08816634cd7191b93b27628914e56747aae4bfb7d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A2 10620 bytes