Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d64e226659e23b4…

MALICIOUS

PDF

70.8 KB Created: 2020-12-16 21:57:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c6991b3a991fe11a8fd24f3e488ed71e SHA-1: 9a35d7298003deb960457e63ecd6c395f74f7c15 SHA-256: 8d64e226659e23b4ebf5697b930a370392a5ccc8786b455036c63ed02e002ffd
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The primary malicious URL identified is 'https://gettraff.ru/123?utm_term=unturned+4.0+beta+code'. While no scripts were extracted, the nature of the redirector suggests an attempt to lure the user to a malicious site, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gettraff.ru/123?utm_term=unturned+4.0+beta+code In PDF document text
    • https://cdn-cms.f-static.net/uploads/4500440/normal_5fd2019b60769.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426682/normal_5fa13070493f9.pdfIn PDF document text
    • https://dapijapivabug.weebly.com/uploads/1/3/4/3/134338952/rofew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402944/normal_5f9358d2872df.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0fb6b88c99b6d37a78a63/t/5fc14b90f3de5e49b5943b8b/1606503313649/sonusofajig.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2a81ee5c7695ca9a6fa19/t/5fc3af182dd96f59185e6ccd/1606659864698/navy_jrotc_uniform.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5eb9a48-8a5e-4be4-955a-a437eecf0f8e/yandere_simulator_guide_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/http_connectivity_check_android_com_generate_204.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc50ba1a87939686422cdfb/t/5fc54adb6457125654ea83d8/1606765276669/autodesk_inventor_cost_calculation.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/shoot_em_up_games_pc.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB959 5116 bytes
SHA-256: a599d6646a8f66a83e6c1af93c0e71af5872930e4af81537cc77633bd2554a4b
font_01_sfnt_off0000cad4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAD4 2140 bytes
SHA-256: 4aa92bdf0eec2698f86cee620bbd305064f10bd0d7677b679eb050dc85b11dec
font_02_sfnt_off0000d474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD474 10812 bytes
SHA-256: 9b4b2cdb2bfd7d70c137856e92854c63c1d7b3d20c7e2c1a68bf44a1a1ecdff7
font_03_sfnt_off0000f9b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B4 16036 bytes
SHA-256: 354dce64f07f3d7acdf6a04edf763950ffbfec4edcbb4bfe17b65a83544077bb

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