Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b659d3e387d5ac9…

MALICIOUS

PDF

54.6 KB Created: 2020-11-21 12:17:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: b31a7d033c2b2d8b86758363b541d2d4 SHA-1: 8321b70827648d355958f90de6b5ba4fe5708f74 SHA-256: 5b659d3e387d5ac95326f8be2a7779074977cddb744f7d92a1f0b65829accd01
252 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to redirector domains, including one identified as a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to job reference letters. The presence of multiple external PDF links and a malicious redirector indicates an attempt to drive traffic to potentially harmful sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9040

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/aws?utm_term=job+reference+letter+template+nz In PDF document text
    • https://nimitokusewifoj.weebly.com/uploads/1/3/4/6/134647116/888449.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426572/normal_5fa866a325d89.pdfIn PDF document text
    • https://jobugatiponez.weebly.com/uploads/1/3/4/2/134234820/6794589.pdfIn PDF document text
    • https://rigafefabapamum.weebly.com/uploads/1/3/4/4/134486683/pijof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23ced3b5-75c3-4159-98b7-cf15cc99f518/16793365780.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80997ed1-63f0-49e8-b6b7-70795e7d2f03/sesirub.pdfIn PDF document text
    • https://s3.amazonaws.com/jasipefulaxiduj/birubabilameponekop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee9062aa-c0a6-4d9e-b4fa-5dc31ed02bf7/senirakuzevidibetapopo.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/94777619340.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c08bba2-0327-4ab0-b3b6-872ac6be607b/lifafizopilosuma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5e18155-7b62-46c3-8417-160a5af23b06/patrol_leader_handbook_scouts.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/cobra_2500_watt_inverter_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/66077155009.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/27904537439.pdfIn PDF document text