Malicious PDF — malware analysis report

Static analysis result for SHA-256 956a81118f11352d…

MALICIOUS

PDF

78.4 KB Created: 2021-01-06 06:18:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 006b23c906ddcaf3706e0c7d297ee46f SHA-1: 733a0da702661c00acf3c7b3eb5295c00b6957f3 SHA-256: 956a81118f11352dc03ac66090921e2b38d896a6e07e90f15b952d9d28c2a986
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'traffine.ru'. This URL is presented within the document's content, likely as a lure for the user to click. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with phishing or malware distribution.

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://traffine.ru/aws?utm_term=aace+osteoporosis+guidelines+2019 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370066/normal_5fb80fc9bd1b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385230/normal_5f9c9af4c9c0f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426413/normal_5fcc5714c2153.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kujesulad/cherokee_north_carolina_fishing_report.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/dofolulazosuras.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/71348465093.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19344295-d198-40a3-b453-fa17ca9807bc/63395129969.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/44335386902.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b728ca6-a5ae-448a-a0b5-b85f2962bf4a/carrie_novel.pdfIn PDF document text
    • https://s3.amazonaws.com/zagubip/editable_christmas_party_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/call_of_duty_modern_warfare_maps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15cce437-942e-4c3d-9442-bc3324f9e1a1/3_quart_glass_microwave_popcorn_popper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38de70c2-f7b2-419c-a2bc-3c8284da01a1/neverwinter_refinement_points_farming.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/garode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d8a9465-f51b-45f1-bc2a-1da7e1510e62/41855017824.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_off0000f500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF500 5712 bytes
SHA-256: 932a3884542413e094cb856350c60f4d2951458538cafaa410b8a64ab5992717
font_01_sfnt_off00010884.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10884 10468 bytes
SHA-256: 4572e345946737f4a1c1756faf14d78724172490316153a956606112deda3667

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