Malicious PDF — malware analysis report

Static analysis result for SHA-256 628e9122eb0093dc…

MALICIOUS

PDF

102.6 KB Created: 2021-01-08 21:11:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: edff08e721bcffb9bc5eb67a47f50f98 SHA-1: 9e896073e59010c5f6a429471c90425e523e429c SHA-256: 628e9122eb0093dc3b643917c4f8685bb7e56891ea3d480876c4dbb93f907eec
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 'traffine.ru'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL suggests the document's primary purpose is to lure the user to a compromised site, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/123?utm_term=akashic+records+of+bastard+magic+instructor+sistine+and+glenn In PDF document text
    • https://cdn.sqhk.co/ramekodetuwe/ajdjjfP/water_slide_bounce_house_combo.pdfIn PDF document text
    • https://cdn.sqhk.co/ludafojebi/RYOu5R2/2575877920.pdfIn PDF document text
    • https://cdn.sqhk.co/zunesunatiri/d7jihck/28444792588.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423696/normal_5fe64ec59bb3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371524/normal_5f884c5a9bbc6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453134/normal_5fbb27c0c7cfa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366984/normal_5ff043ff2754b.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/2a0a571a-6e1a-4950-a7a1-5371903479f9/4492371156.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/905edab1-4652-48d6-80bb-87af63e2ae46/puzzlemarker_discoveryeducation_com.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/texosikafiju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9e8fc2c-e05e-4a9c-bf30-140921be34b9/mixanuvukasuvakumasetomej.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_off00011240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11240 20016 bytes
SHA-256: f8574c7a005f794a439df18f19d4509a0468046971b7a2a618d03ada84a0eefa
font_01_sfnt_off0001525e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1525E 5628 bytes
SHA-256: c7f5490ca4dd368d9658025781a49d73e4da3955846fd9cd71cfebb1a8685959
font_02_sfnt_off00016558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16558 12296 bytes
SHA-256: 6b80574243ccb5999828c8a501a16152c2392baa15fdebb7188c58e5d09a90cd

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