Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c1f9bcced5c5e85…

MALICIOUS

PDF

66.9 KB Created: 2020-12-07 11:48:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: c6bab917380a892527233a862fe6fd54 SHA-1: 12c9818fc5e1698e6dd9fcbfe62e12e6fa7842c6 SHA-256: 5c1f9bcced5c5e85c040768b19c88683a6212003d8063c778d3a8afc2dc71c08
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 'ggtraff.ru'. This indicates the document's primary purpose is to lure the user to a potentially harmful external site. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ggtraff.ru/123?utm_term=36th+wedding+anniversary In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369334/normal_5fa2651629204.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403429/normal_5fc9159a36085.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366360/normal_5fa900378c1fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371272/normal_5fb845dc4c48d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408709/normal_5fbb3195c7980.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/5fc5933e8787e879898ba58f/t/5fc9a03a196a600d3c2c5863/1607049274579/29077236057.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/24627621642.pdfIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/anime_girl_cute_wallpaper_android.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/vudobojefu.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/zeret.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/nadifanobugepule.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_off0000c90c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC90C 5532 bytes
SHA-256: 6895fbccdba521c209be803d7b2428d61d910f2c935b1052d6f85f16f29d2ad8
font_01_sfnt_off0000dbf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF3 10308 bytes
SHA-256: 63086d7f8c65d25836202b8b558a80ef7aef2993a2bd353f20d5c72ed9c4782c