Malicious PDF — malware analysis report

Static analysis result for SHA-256 e879cfa97b3e01b5…

MALICIOUS

PDF

71.1 KB Created: 2020-12-27 05:41:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 5a15de99a5462bfa6d5ef381fc35e1ec SHA-1: d2cbde4a3cb7339ef53b211dd47a38de6f7e794b SHA-256: e879cfa97b3e01b566e6626e67027137ab501aa3b2e951aea9e249fe295c2374
154 Risk Score
Tags
free-cdn-ebook-manual-lure

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 'gettraff.ru', which is likely used to lure victims to a phishing site. The ML classifier also flagged this PDF with high confidence. While no scripts were explicitly extracted, the PDF structure and the malicious URL suggest a phishing attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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=dysrhythmia+nclex+questions In PDF document text
    • https://static.s123-cdn-static.com/uploads/4379974/normal_5fe1cb619f138.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366665/normal_5f956f536d193.pdfIn PDF document text
    • https://cdn.sqhk.co/folamudoj/jgAifhh/ted_talks_brene_brown_empathy.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/7bee3d41-813a-4754-80b9-fea32e6a1b1e/mobedifufosoredulupuz.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/e46_manual_transmission_fluid_capacity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/443cc7d7-9e7b-4313-ac6a-1686361476cd/47067677322.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48d86224-1f1d-4629-8db4-689b939ead6e/63855216707.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3125c4cb-d2e5-42c8-9b6e-433b9b38b965/parasternal_long_axis_view.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1805661-adbf-496c-82e1-3537e44e7a2f/josh_jones_crappie_guide_ok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b6af8cb-b12c-415f-a96c-30c26c6fe3c0/92911098589.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9047ddee-87c6-41f8-aadf-a14a53a9250c/46880530820.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_off0000d76d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD76D 5336 bytes
SHA-256: 73139df1452f92b2e58d49044e1991e6e72446dbb5513fdb7b079f3913f15e45
font_01_sfnt_off0000e978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE978 10920 bytes
SHA-256: 6dbfc70d0868c8134dac81e47600db57e53793a21597276c5f73bcefeaf8a183

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