Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e6bcfe40e75e86a…

MALICIOUS

PDF

73.7 KB Created: 2021-01-11 19:03:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: da09b8c6cbd80843e6d3004f82c39df1 SHA-1: 6b486bce68cc22ec16175f261b3d696a6484b7eb SHA-256: 8e6bcfe40e75e86a2ba8fc8b28f9ca18de9d85c722ca57bdbcad6c975b82b08f
154 Risk Score

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 embedded URL, 'https://cctraff.ru/123?utm_term=conectores+para+redactar+en+ingles', is the primary indicator of malicious intent. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the redirector suggests a phishing or malware delivery attempt, aligning with the Spearphishing Attachment technique.

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://cctraff.ru/123?utm_term=conectores+para+redactar+en+ingles In PDF document text
    • https://site-1174882.mozfiles.com/files/1174882/25702769963.pdfIn PDF document text
    • https://cdn.sqhk.co/bogulevim/jghjhj7/pixel_car_racer_unlimited_mod_download.pdfIn PDF document text
    • https://site-1188059.mozfiles.com/files/1188059/aces_of_hearts_cpr.pdfIn PDF document text
    • https://site-1176380.mozfiles.com/files/1176380/xirefidatumawegeku.pdfIn PDF document text
    • https://site-1194115.mozfiles.com/files/1194115/58973396761.pdfIn PDF document text
    • https://site-1168172.mozfiles.com/files/1168172/xugoweburubodegix.pdfIn PDF document text
    • https://site-1213938.mozfiles.com/files/1213938/clockwise_app_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414696/normal_5f95c70a19f71.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/posufij/zisufalexerewolawe.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/live_wallpapers_for_android_phones_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/some_information_about_a_lure_crossword_clue.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/jonud.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_off0000e487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE487 5144 bytes
SHA-256: 919a80ea8d45efa9cd0b14fcfeeb8775240c4d73b8f76c92069a625c4667e7c5
font_01_sfnt_off0000f613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF613 10404 bytes
SHA-256: d3c5ec20131d20cd541cb65ea060d368bd1b940a648f78bda0f0e75dd12416fc

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