Malicious PDF — malware analysis report

Static analysis result for SHA-256 caea2ee12be38e7e…

MALICIOUS

PDF

68.4 KB Created: 2020-11-21 11:39:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 177489a8dacdf372df9cefbacec54a5e SHA-1: 74eab198adfaf005eaa48a8c72ecb52f57978f6f SHA-256: caea2ee12be38e7ebdfe60dd02af65b85a5bdf63a307be381fd817f1b47b7ff5
222 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating malicious redirection and a link farm, including a critical finding for a PDF redirector link to 'traffine.ru'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest the document is designed to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffine.ru/aws?utm_term=insurgent+dual+audio+movie++480p In PDF document text
    • https://cdn-cms.f-static.net/uploads/4408170/normal_5fad9794cdbe3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416149/normal_5fb58ee281f67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401972/normal_5f9520d2cc8a2.pdfIn PDF document text
    • https://buxiniti.weebly.com/uploads/1/3/4/3/134309366/7465817.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366034/normal_5f8748f9b76d5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc65f2f3-0487-4394-89af-66c8f4f8509a/144067413.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4d8c3c0-08c0-44e9-bd1d-1742fcf74db2/4984757952.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e6ec0c7-c1b4-43cb-97fe-803b6315247b/monthly_calendar_2019_2020_printable_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/baixar_creator_gratis_em_portugues.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f082691-01c6-434e-941e-2010f2057a48/15520966741.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76971efa-cf4f-4c06-94b9-38a68dcaf655/1970730494.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_off0000cc4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC4D 5700 bytes
SHA-256: 1497b4ef84a40ac9c83a1b0a3770a9e965883656e7cc6423f43c7da9495327fd
font_01_sfnt_off0000dfaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFAF 10908 bytes
SHA-256: 1eb301d094578c8439d1a4a708ae99f1beee7d531291503704fe0c71935fe123

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