Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7e434cbae917f79…

MALICIOUS

PDF

88.8 KB Created: 2020-11-10 12:01:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 99dee6d270ed2e7ecadfb3b519238db4 SHA-1: e69bb6b419da3a8f6808c9ac4e19ab4b6044631f SHA-256: b7e434cbae917f7951098c02471557b8cf5835ab06bfee9f762a5024645fbb4c
154 Risk Score

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 'traffking.ru'. This indicates an attempt to lure the user to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient evidence of a phishing or malware distribution attempt.

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/123?keyword=beauty+health+massage+chair+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4471096/normal_5fa6289510748.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411709/normal_5fa9e4e836be1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/2ffccb3f-1b54-4acb-93a7-1aef53531232/jaxorijimujamumimik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14c4b235-97cc-4092-b023-c8c1ef7fa617/xiviginevisekomozanerot.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/wowogexulifawef.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/guess_the_christmas_carol_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6733caf-5382-46bc-b9b8-57edf7f942dc/mutoralavaru.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/pusuvewetibusenak.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/gamukaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b943b19-1b56-486f-b178-07b38517cc3a/gadamulopede.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d0aa58b-ee41-482e-916a-57c75429094e/69916719825.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/naruto_vs_bleach_2.1_unblocked_at_school.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001130d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1130D 5136 bytes
SHA-256: accadf1f6eaa594107303cb64a4de041dba4e49eff42c28e19e345241395e9cf
font_01_sfnt_off0001245d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1245D 10564 bytes
SHA-256: 511234b174b1a4381f6f9401888b0753a541daa0a866e6a596b6f57635f5ae5d
font_02_sfnt_off00014845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14845 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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