Malicious PDF — malware analysis report

Static analysis result for SHA-256 287483d83b977aac…

MALICIOUS

PDF

82.9 KB Created: 2020-12-27 02:51:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 20d839076516390803a5b26923144c21 SHA-1: 2b813cb24768311f12e605e1572dc6b29524d1b3 SHA-256: 287483d83b977aacdb97b2a1835dcfa5b60f9ce64f51897f4f52db9788596fe4
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious domain, traffking.ru. This is further supported by ClamAV detection and a high ML classifier score, indicating a phishing or trojan distribution attempt. No scripts were extracted, but the primary attack vector appears to be the malicious URL embedded within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffking.ru/aws?utm_term=plague+inc+strategy+guide+fungus In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371267/normal_5fa208a9eb062.pdfIn PDF document text
    • https://cdn.sqhk.co/zumiredosuwi/tjiw23O/gotijazurojo.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/95954796-40ad-4575-80fe-416dc2698853/zuvawapototesoposaxek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b37742f6-52fc-4637-988f-f0689ece5d94/37480573651.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f767c3cd-60de-42de-80ef-380cdabb95d9/medford_craigslist_gigs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7428d27-3e78-4836-8feb-785f1088aad0/nodipepilaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8b7a075-2bf1-4aa0-9b61-8a5528362175/ripalezitabizital.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a076c2c4-e9f0-40cc-b728-a6f65f6f823a/67076904971.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/comparative_adjectives_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/068401c9-fc91-477f-93a8-107d0fbe2f49/pifijoxuxovovitarudenak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95430244-8872-4de1-b60b-01af447ef502/529864443.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ce4af20-8695-4500-8f73-a39041215593/dosajiwog.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_off000105c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C7 5292 bytes
SHA-256: f7623947e927072971304414e78fabadbdd2a0faf861b967afc4897d7fddd004
font_01_sfnt_off000117de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117DE 11720 bytes
SHA-256: 427f433bb95e194e6f13978b8082e88ffb9ffdd4afe5d911fc1ee5eead5979c4

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