Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff41bd4aae14d058…

MALICIOUS

PDF

59.9 KB Created: 2020-12-06 22:49:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: a2014219755973bc395429fc2ce019eb SHA-1: bd3bfb19ca8217170c7ad3f9620638e56dc46988 SHA-256: ff41bd4aae14d0587b032bc8221af73bf61b00456a9b24c077e1da19bf2d102d
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 a suspicious URL. The ML classifier also strongly flagged the document as malicious. While no scripts were extracted, the presence of a malicious URL indicates an attempt to lure the user to a harmful site, consistent with phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=tu+vs+usted+worksheet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382789/normal_5fb276869bc42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420600/normal_5f9ab8c6b604c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423154/normal_5fb2e7790c6c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501231/normal_5fc7a64f367cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381532/normal_5f922968dc517.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/5fc2b0d2239b0722913ccfbe/t/5fc3b1059b1ed035384dc0e2/1606660357517/865322280.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/78535246915.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ea21c30a162e0c52977d/t/5fc14b1a9ee0f32b87829f11/1606503197384/48760607605.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0eb456b97992eb55c2a22/t/5fc14b3b5147b1480463402e/1606503230647/earth_taken_3_unblocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d2134ad-0500-4b2d-86f2-2c86f0fa7cc4/nilipufotalebasabarem.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/8940073189.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81811a81-cd10-466e-8292-85e02e773b4b/57027447047.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe26224e98326c02d97430/1606297122520/67029516848.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_off0000af3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF3F 4836 bytes
SHA-256: 97052e4b10fe1624e18d5defc0a58ff288918f076aca993f21bdf15036f645cf
font_01_sfnt_off0000bfc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFC2 10408 bytes
SHA-256: 1ec5bb2ada4de940b9c475d8d5e4c92b54998eb4a81236bf6ed59d77bc9850a2

Open this report in the interactive analyzer, or submit your own file for analysis.