Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8b8be824265c738…

MALICIOUS

PDF

52.6 KB Created: 2020-10-28 08:12:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 0a905c61737881435ff0594ccf6159ef SHA-1: 17bb9b5a5dcd3df7df84d14bbc989ffff1fc7a16 SHA-256: c8b8be824265c7384ef664654533fbacddf9911d596dfcbb02414f7c2ac548f7
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The embedded URL, https://ttraff.cc/123?keyword=gsl+code+s+season+2+group+d, is the primary indicator of compromise, likely leading to a phishing or malware download page.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://ttraff.cc/123?keyword=gsl+code+s+season+2+group+d In PDF document text
    • https://nikokabiliru.weebly.com/uploads/1/3/1/4/131409463/8af63683efc2b.pdfIn PDF document text
    • https://sizukejagu.weebly.com/uploads/1/3/2/6/132681884/6589686.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://cdn.shopify.com/s/files/1/0437/6035/3429/files/44174335733.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/0853/8796/files/joxigatikarabotisibod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/5248/9624/files/modern_construction_materials_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2585/7181/files/danger_dash_mod_apk_game.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3018/2571/files/73713939406.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f85fa83-0cce-4ef1-b4d0-3dbdcf80877c/21967970140.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb7abb8b-ad3d-4f19-a9ff-e987c06cd3d9/75703722669.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/19137414536.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/english_speaking_notes_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/uefa_champions_league_2019-_20_calendar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcf2aa4d-98fa-4035-8174-0e813b0a8e64/juledalox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd34c94f-1b21-4f2a-ac5c-143309cfd278/77479591158.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_off00007ed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED6 5160 bytes
SHA-256: 62b913a2f5dd8e48c3b76ff762b7191a6c9b61a090824cd33f2a925edf7a7329
font_01_sfnt_off00009069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9069 11588 bytes
SHA-256: 22ef7b91f7c217c76c4fae8dbf251a1ae74c78bcb075f45aef634dc3ddab5105
font_02_sfnt_off0000b74e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB74E 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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