Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf1ee3083f82e997…

MALICIOUS

PDF

72.8 KB Created: 2021-01-06 01:26:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d178de1532a76bde3ec96c4d7bd680af SHA-1: b860928a32c53b41614f1351dc5ee5dc82ebe2a9 SHA-256: bf1ee3083f82e997ffc52e80f81cce52b88fa586cadc26f77ca1bae039c46e54
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple critical heuristics as malicious, including a redirector link and a link farm. The embedded links, such as https://gettraff.ru/123?utm_term=sig+mcx+user+manual, suggest an attempt to redirect users to malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and link farm indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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=sig+mcx+user+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4488101/normal_5fb7aeb0d9536.pdfIn PDF document text
    • https://seririgikum.weebly.com/uploads/1/3/0/7/130739922/da6418d8818.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380539/normal_5fe0b5cedaac0.pdfIn PDF document text
    • https://cdn.sqhk.co/tatiwurixiwo/hjjiQjb/sokasegumesujajebevezokel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406216/normal_5fee9019e3784.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388162/normal_5fc303ab9cda4.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/039dc7a4-cc66-46bc-a494-14390639c362/persona_3_sun_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41afdc5c-1ad1-406d-a62a-16bba9a35a15/tcm_forklift_parts_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4841179c-942d-4746-84b7-e897e9e6883c/5568132556.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d013c233-e260-4c16-9eb5-d933be76b0b5/82368715170.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/806cb570-f308-45be-8f1b-d48d035b6170/busubuzapoki.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_off0000e042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE042 5292 bytes
SHA-256: 11189faaacbeac2e88759abee4d975b6917356a22f14ea634cec86ea5852a358
font_01_sfnt_off0000f231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF231 10756 bytes
SHA-256: 0957659c664382782921c57ea3d7641c4edd68f79cddb6d2c6e732f73025fbb0

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