Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d73ac397e02cf3b…

MALICIOUS

PDF

62.8 KB Created: 2021-01-16 22:40:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f7653ee21b4e2476d652824dbb71d7cf SHA-1: 77b7fded29b6606a542924af24a0b05e5b4aed88 SHA-256: 3d73ac397e02cf3b2bfd17934ca449ffbafe4fb7288f831362a0da913e94ec2e
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, consistent with phishing or malware delivery.

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://ggtraff.ru/123?utm_term=david+winter+cottages+ebay In PDF document text
    • https://site-1244605.mozfiles.com/files/1244605/biggest_achievement_interview_answer.pdfIn PDF document text
    • https://site-1166725.mozfiles.com/files/1166725/mt_rushmore_weather_in_april.pdfIn PDF document text
    • https://site-1222023.mozfiles.com/files/1222023/12030780152.pdfIn PDF document text
    • https://site-1179842.mozfiles.com/files/1179842/exercises_to_avoid_with_bad_rotator_cuff.pdfIn PDF document text
    • https://site-1182116.mozfiles.com/files/1182116/60643657541.pdfIn PDF document text
    • https://site-1166704.mozfiles.com/files/1166704/game_recorder_windows_10_free.pdfIn PDF document text
    • https://site-1176140.mozfiles.com/files/1176140/nuxakagemomofu.pdfIn PDF document text
    • https://site-1175466.mozfiles.com/files/1175466/whatsapp_wallpaper_library_not_working.pdfIn PDF document text
    • https://site-1199448.mozfiles.com/files/1199448/8580917104.pdfIn PDF document text
    • https://site-1173664.mozfiles.com/files/1173664/soccer_eleven_top_football_manager_2019_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/22454484701.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/lapajusumozud.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/luwowukibusemewuwu.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/27318250658.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b8b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8B8 5468 bytes
SHA-256: 1d786f0721aa0bcc98f38e30bde01113a592977995382e7ca0e2866e3c46a6fa
font_01_sfnt_off0000cb7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB7D 10344 bytes
SHA-256: 33f044597436219f07bbb56a57b2ae951b53397ec338776e6ae7ad504317b67c

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