Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dcba409341370c1…

MALICIOUS

PDF

106.8 KB Created: 2020-11-03 07:13:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ff62e14d5982fedc7bc4dacbeba254a9 SHA-1: 9938a9dd3d0a66197173706f284e3b365add9060 SHA-256: 6dcba409341370c10a4d96a8e34f427418f00ddb5f8a920c210179cf2fbf9d7c
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link to 'https://ggtraff.ru/strik?keyword=uncagedgamez+mortal+kombat+11+johnny+cage'. This URL is likely used to lure victims to a malicious site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://ggtraff.ru/strik?keyword=uncagedgamez+mortal+kombat+11+johnny+cage In PDF document text
    • https://mipirizu.weebly.com/uploads/1/3/2/6/132682564/2787789.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427498/normal_5f9b920ce80db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369917/normal_5f91db3f767be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389586/normal_5f9664ecb01c4.pdfIn PDF document text
    • https://rivatuvimib.weebly.com/uploads/1/3/4/4/134469475/tutujuko.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/patotale/fovepij.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/32513059041.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/judge_jean_woodford.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/5186/7029/files/padidowakugedose.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1264/4251/files/19598039259.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001537b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1537B 5388 bytes
SHA-256: 5affc34cf25d40d3f5439598db086fced15c7fb41e0b093ba97dc02b4cda510b
font_01_sfnt_off000165b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165B6 13024 bytes
SHA-256: fded45041ce0936ad71e037ee3f034266591240bc9846e4a4402fab60669f388
font_02_sfnt_off00018fdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18FDF 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361