Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d20b3db5508710b…

MALICIOUS

PDF

84.6 KB Created: 2020-11-11 23:46:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: ff83a0766d526daf915582e8f42ab579 SHA-1: 80fb8244c0ef94fbaded23c7bce1a384d272fefb SHA-256: 8d20b3db5508710b593c8144925dda00d8c3f467ad30f8cb7e9defff1f482303
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF was flagged as malicious by multiple heuristics, including a critical alert for linking to a known malicious redirector. The ML classifier also assigned a very high probability of maliciousness. The embedded URL, https://gettraff.ru/123?utm_term=cognitive+process+theory+of+curiosity, is the primary indicator of a phishing or malware distribution attempt.

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=cognitive+process+theory+of+curiosity In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388177/normal_5f93be6e44798.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416302/normal_5fa722f997ae5.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/4da52804-779f-45d1-a568-e7c3d6f13de0/un_ban_anime_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/zavekarezatasuwaki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd153707-144a-41a9-8c47-83f39b645b40/51274210935.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4c9c5b5-16d8-4a29-9db8-47ae30604007/scarface_the_world_is_yours_patch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bef897fd-84db-4079-9ebf-1ea5cb38fbbe/febrile_seizure_guidelines_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/20268915587.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d604837-428e-4cd6-9466-dc00901a1b5f/68457044020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c094f6d-3caf-4ca9-965b-a8a2098e5691/recycling_sign_number_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e9e32ab-a3e0-401b-82fc-f356a9391444/lanemazubaxelukom.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_off00010055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10055 5104 bytes
SHA-256: 634393d5e2f9e7d2e436cb0ec489c7146092347804d09643906dfc7d10a40349
font_01_sfnt_off000111c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111C9 11188 bytes
SHA-256: cc25813a3c9485698975ed4aa280b0b416313d882e5bdf0f94542c1ad02c32ad
font_02_sfnt_off0001372f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1372F 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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