Malicious PDF — malware analysis report

Static analysis result for SHA-256 289d3ce2db35bf9a…

MALICIOUS

PDF

77.2 KB Created: 2020-12-27 19:35:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 398f8a8098c8255ce63f7ca0e9fb1392 SHA-1: 735663e55f5ced763b7a23d424d1b418c912b3c7 SHA-256: 289d3ce2db35bf9a63f645fc78196239108e5e501a42eabd9639792c7e1b701b
154 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. The embedded URL, 'https://cctraff.ru/aws?utm_term=columbia+river+bass+fishing+report', suggests a phishing attempt disguised as a fishing report. The ClamAV detection and ML classifier further support the malicious classification, indicating the file's primary purpose is to redirect users to harmful content.

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://cctraff.ru/aws?utm_term=columbia+river+bass+fishing+report
    • https://cdn-cms.f-static.net/uploads/4369308/normal_5f9bbd666b2b9.pdf
    • https://cdn.sqhk.co/norifasil/jfijhgK/15887027803.pdf
    • https://cdn.sqhk.co/rurokusulos/3J4ggex/frontline_commando_d-_day_download.pdf
    • https://cdn.sqhk.co/ditetona/TKXLG7b/11271661313.pdf
    • https://cdn.sqhk.co/sirejeforox/GghlBJt/93355496519.pdf
    • https://cdn.sqhk.co/masamiwe/ibFMgjd/download_game_candy_fever_mod_apk.pdf
    • https://cdn-cms.f-static.net/uploads/4391605/normal_5f9e3fd5c5bce.pdf
    • https://cdn-cms.f-static.net/uploads/4386829/normal_5f91f38c00a8e.pdf
    • https://cdn.sqhk.co/puwokiraf/LSl2gge/best_interior_design_blogs_on_instagram.pdf
    • https://cdn.sqhk.co/jumifokujuje/5R1jjge/strategy_games_ps4_ww2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0b47fa01-bc9e-4676-bf11-77667148d39b/sujutozuxenogid.pdf
    • https://uploads.strikinglycdn.com/files/cb618c84-f201-4ce9-b2af-ad3bd4f7c443/osmosis_jones_analogies_worksheet_answers.pdf
    • https://uploads.strikinglycdn.com/files/61cf7366-38e8-4925-90a9-b74a5c925917/3422922571.pdf
    • https://uploads.strikinglycdn.com/files/852d6f01-eebe-4b0e-8c1a-5933426ce3d3/95480555806.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_off0000f1f7.bin
ad54d0e512b4869b1a68b79ba372d3297fcfbca0ae7248ef9c2d4596069c1e66
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F7 5420 bytes
font_01_sfnt_off0001043f.bin
be9c268914694b0c22ce621da42d598f01f7a2d3c19f38b0dd0b02cfc023b3a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1043F 10516 bytes