Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3a1143fdb5942a6…

MALICIOUS

PDF

48.7 KB Created: 2020-10-30 02:52:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1f6d7ac5c17229121038bdbec7c8080f SHA-1: 22ce7a95f4815cb4e8bb80c80a35faee7f141e15 SHA-256: b3a1143fdb5942a6f175d69c9e4865e8266ffe56a64262396340466679dcd0e2
102 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a malicious redirector link pointing to 'ttraff.ru', disguised with a lure related to a game mod. The ML classifier strongly flagged this PDF as malicious, and the presence of a redirector link indicates an attempt to deliver a second-stage payload or lead the user to a phishing site. No scripts were extracted, but the PDF structure and malicious link are sufficient indicators.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=sims+3+werewolf+mod In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368731/normal_5f88181f4b8ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376099/normal_5f8c70671caaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428045/normal_5f988a702c198.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/mijedusovineti/97350832051.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/kidezuwizepuxuxagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdfc3d36-6617-4a5e-812a-81235583a113/59971103801.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/gidukexiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac628617-ca36-4588-965b-744dd0361216/51104538737.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/doramupurofu.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/wegepafabapokomebi.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/mobile_marketing_journal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6101dc33-a836-48b1-9eb8-005ee5b422e3/81277234690.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62a4754c-04fa-4bdd-8f3d-82963dc37f44/gokigewubaxikariwamil.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_off00007ee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE6 5204 bytes
SHA-256: 180f4e919ee12d4f0c5ed8e28ed42873a17028afdde2b63456eb6af444b94ceb
font_01_sfnt_off00009096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9096 11188 bytes
SHA-256: 3832c7fd554dbadfc3fbab26b6b8512c4554bb916e9c1993c7ee43d6a1ae8e52

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