Malicious PDF — malware analysis report

Static analysis result for SHA-256 114193e709a3dbf5…

MALICIOUS

PDF

65.4 KB Created: 2020-12-09 07:15:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af8808c0f3ffded1b1cad19ecd3334a5 SHA-1: b9e71855791901ab66ad10e4ba51469744402d10 SHA-256: 114193e709a3dbf5430a067029948d5d14b2b79adac91b5d6044fd9988a10ab3
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, gettraff.ru, which is a strong indicator of malicious intent. The ML classifier and ClamAV detection further support this assessment. The document body, though heavily obfuscated, appears to reference a book sale, suggesting a social engineering lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=barnes+and+noble+leatherbound+classics+le+morte+d%2527arthur
    • https://static.s123-cdn-static.com/uploads/4382618/normal_5fc66dcda3ba3.pdf
    • https://cdn-cms.f-static.net/uploads/4389571/normal_5fb642cadc584.pdf
    • https://cdn-cms.f-static.net/uploads/4496381/normal_5fad62d29128a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/997dbda1-9173-486f-8b22-8a9b0599cbe2/88340948403.pdf
    • https://s3.amazonaws.com/ronatiduzoxij/wevisojotakesumoboju.pdf
    • https://uploads.strikinglycdn.com/files/1c9eb910-9096-4fa7-b59f-1c3678a03c0b/google_drive_coco_full_movie_english.pdf
    • https://uploads.strikinglycdn.com/files/7e22c814-dfcf-494b-bc4a-bba2e03e4c14/63578026890.pdf
    • https://uploads.strikinglycdn.com/files/c9e6fd1e-aec4-4900-b02a-3f5b0662cb5c/4209975804.pdf
    • https://static1.squarespace.com/static/5fc4dcc35687f52b6b9a9a8f/t/5fcf609e3fa051062b465231/1607426206990/kunewiwasalojumimalip.pdf
    • https://uploads.strikinglycdn.com/files/e6b6fc00-4adb-4039-84fc-4da55e80c0ec/semanuseges.pdf
    • https://uploads.strikinglycdn.com/files/43381702-1aad-4013-9cb3-ddab8887e36b/kobalt_kt1015_replacement_parts.pdf
    • https://uploads.strikinglycdn.com/files/824b0020-9c9c-40f5-86ff-1efab3569ae7/31910409504.pdf
    • https://s3.amazonaws.com/bisazabe/bekebara.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b2b8.bin
c9af6e1c70445555016be1faf1cdbeb5fbc4703c60add50b592b251634e498b0
pdf-font-stream PDF embedded font (sfnt) at offset 0xB2B8 5284 bytes
font_01_sfnt_off0000c47d.bin
1cbff0d2968a62b21efe81c1fe832b73d18a3f92e3e5aaf2ea14b35d21130567
pdf-font-stream PDF embedded font (sfnt) at offset 0xC47D 10916 bytes
font_02_sfnt_off0000e9d3.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D3 4324 bytes