Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c44925f3aecd7da…

MALICIOUS

PDF

79.6 KB Created: 2021-01-02 19:09:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: da8d4aae48db727f869a112e1d307227 SHA-1: 7bd54b71b67b4255890e7000dafae0bddd012eac SHA-256: 9c44925f3aecd7daf3d987e57d665ded41bffc4b6bbb9da0255f26546d38d313
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL 'https://traffine.ru/123?utm_term=lehigh+valley+legion+baseball' is flagged as malicious. The ML classifier also strongly indicated maliciousness, and ClamAV detected it as 'Pdf.Phishing.Trojan'. No scripts were extracted, but the primary function appears to be directing users to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffine.ru/123?utm_term=lehigh+valley+legion+baseball In PDF document text
    • https://cdn-cms.f-static.net/uploads/4485589/normal_5fb2c2dbef01b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378843/normal_5f8fb8351cadf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459326/normal_5fdb12e685843.pdfIn PDF document text
    • https://cdn.sqhk.co/duzupafuj/fhf9Sjf/18108095792.pdfIn PDF document text
    • https://cdn.sqhk.co/vefutifeves/ghtgeGS/keguvezagimolij.pdfIn PDF document text
    • https://cdn.sqhk.co/fasixazijaz/czIDbha/spacex_rocket_launch_schedule_2020.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/ea372ee4-69f6-44f9-891a-55646af595e8/zuxufu.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/guess_the_movie_scenes_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/caaa52d7-13a3-460c-ba22-7db33b7d8a9b/lovuriwarevitifet.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/guwipirejadowozik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9b001cb-8d96-43f0-a015-9ca05e2a58ec/oc_x_toy_chica_lemon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f7af8d9-461a-4822-bb43-401b3794b0e4/97447449787.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/831a8eaf-f983-46e8-a6ff-0c1006255b71/58337574648.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_off0000fbb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB8 5096 bytes
SHA-256: 253cad0aba264ed5bf36d9657fcf695e49a5317fabe4071f07499178f8fdb7e2
font_01_sfnt_off00010d21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D21 10808 bytes
SHA-256: 0a1261f037deda9e9c1a3e973dc738d1ec1d145b8dc075bf588971e42f3c3633

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