Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee203f2a0a2cd3e9…

MALICIOUS

PDF

72.4 KB Created: 2021-01-05 06:13:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 801755be7ec00c0a60bcc8d69d6b4947 SHA-1: 907432a9aa39bb622f0cf5772fcb7c44e25ca1a0 SHA-256: ee203f2a0a2cd3e959f9b25ed3daebf2eecd0f36840cbe6fa487f56be6afb117
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'gettraff.ru'. This URL is likely used to lure victims to a phishing or malware distribution site. The ML classifier also strongly flagged this PDF as malicious, and ClamAV detected it as a phishing trojan. The document body, though heavily obfuscated, contains text related to 'coin farming' and the authoring application, suggesting a lure for potentially lucrative but illicit activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wb?keyword=coin%20farming%20tsum In PDF document text
    • https://cdn-cms.f-static.net/uploads/4461204/normal_5fa365400fe67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461219/normal_5fc3694c8c940.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459162/normal_5fc1e6722c327.pdfIn PDF document text
    • https://cdn.sqhk.co/kolokejo/hciajhS/best_costa_rica_resorts_for_families.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406229/normal_5fb27893e662d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497685/normal_5fe1d5335e52e.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/xeruxaxer/88785880287.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/fozinenawagolatat.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/company_chain_of_command_template.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/android_studio_proxy_settings_in_gradle.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/hollywood_actors_name_list_with_photo.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/93427444129.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/48275267139.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB14 4960 bytes
SHA-256: f2e83af9c314c4c77b848662012f1952d6471b0b4b7a64db744451da075637e4
font_01_sfnt_off0000dbdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBDB 10328 bytes
SHA-256: 51e273d3c49c93b310c9e9c7145173e8ab3506d74598762cefb4f658b05405af
font_02_sfnt_off0000ff5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5B 16344 bytes
SHA-256: 7e0863d6dcdfe3ce59f67395a06e5e8634226e44f713773c85e494ff6d119ee1

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