Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0a5b470fbfacf56…

MALICIOUS

PDF

78.1 KB Created: 2020-12-17 00:45:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 0887e78e7d9ec4b7f6c0e09f06231dce SHA-1: 82d0f55d96ffffc890b85a3477fd1510be325eb2 SHA-256: c0a5b470fbfacf56eb793b42d20a58158fe29f3ba1e358a86671654c44bf3672
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 'https://gettraff.ru/strik?utm_term=livestrong+elliptical+models'. ML classification also strongly indicates maliciousness. While no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely serving as a lure for phishing or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/strik?utm_term=livestrong+elliptical+models In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378605/normal_5f8c3c1063229.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460057/normal_5faed0784dd4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453734/normal_5fa08f86e8ab9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373509/normal_5faf330336f42.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/58903d1f-ad4a-4cce-b962-72e171e7494d/pibikiranumejagozulagenuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/775b3637-5043-4e6a-a394-64f87beccdce/65366755265.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/latovuravalevi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfe7e212facd59cea75dab/t/5fc15ad418e72e5fdb0a1b8c/1606507221176/nijid.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc65d1d1c8c741314573aa3/t/5fd6aa1896ed101a3e4bfbe7/1607903776815/savore.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/79209756189.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/schoology_st_john_bosco.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/don_t_starve_together_guide_winter.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/77128126695.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/formas_de_preveno_da_ancilostomose.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/53609169488.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_off0000d164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD164 10312 bytes
SHA-256: b24ab91f96e1ee11b2474048db3b47baa86c71cb1360d1b7864c89c40e13e636
font_01_sfnt_off0000f229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF229 5396 bytes
SHA-256: 3c4b1bb37b0e04701186f143a18e085f74571702040438f68c02ff8abe2bfd25
font_02_sfnt_off00010475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10475 11740 bytes
SHA-256: 6c3c29296b2a6c4d60f15b286076fe0fa4a45a1911d3df276f6cd8102ca2627e

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