Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d8dbdb711ef4f43…

MALICIOUS

PDF

72.0 KB Created: 2021-01-06 20:02:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 50533c1802009a88343d01f16b9527d3 SHA-1: 35cc53fbbc8c7df7b1316da95f23bbfb3d3324e9 SHA-256: 8d8dbdb711ef4f4363d90ba363aa1dbac16e451d3bbf9f801aefbdeebeefd5dd
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link to 'https://gettraff.ru/aws?utm_term=8+ball+billiards+classic+game'. This URL is known to host malicious content. The ML classifier also flagged the PDF with high confidence. While no scripts were explicitly extracted, the nature of the redirector suggests a phishing or malware delivery attempt, aligning with the Spearphishing Attachment technique.

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/aws?utm_term=8+ball+billiards+classic+game In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368740/normal_5fa39834c6bab.pdfIn PDF document text
    • https://cdn.sqhk.co/pirujezexod/jcNghha/dififazolodoladi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375075/normal_5fbc43cc14ad0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502833/normal_5fb00b3bed9e1.pdfIn PDF document text
    • https://cdn.sqhk.co/relulapezele/7hjHMVS/26258322550.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455375/normal_5fee748a58bc1.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/f4d51bcf-c0ac-42aa-956d-2161907eda6a/23576489425.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a2fe5da-eda1-4dea-ad32-739e82870ebd/zifesuwudelomitujifoxon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dbb4081-7a3f-445b-86db-dcb97dbd7255/galloway_elementary_school_henderson_nv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7efb80ea-cc87-42b9-af49-08e2dbea7331/40927489926.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/latest_beyblade_burst_app_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c32e8042-170f-4320-9f68-86b6032babdd/keditekodok.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/57769859653.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_off0000dcff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFF 5496 bytes
SHA-256: 4193ff93fb66dc14efa3e6bbfca403c241ba99abdcb48802775392c6ce6d59fd
font_01_sfnt_off0000ef95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF95 10568 bytes
SHA-256: 635760f4bd23b46a8fdd8381604f653a8822a42ffce244a8b802df13a7c74a14

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