Malicious PDF — malware analysis report

Static analysis result for SHA-256 79260a62ad60c3d8…

MALICIOUS

PDF

66.6 KB Created: 2020-11-30 04:41:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9fa025fb1cdd9d68177937b411eec63a SHA-1: 76dbdfe6d95d982abbd30f706cdb38c63d1171cf SHA-256: 79260a62ad60c3d862513d96a0a894496f9309a9744d0f31713941d42a4bc41d
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'traffine.ru'. This indicates an attempt to lure the user to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL within the document body suggests a phishing or redirection attack.

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=codigo+de+barras+para+productos In PDF document text
    • https://cdn-cms.f-static.net/uploads/4450338/normal_5fa0312406803.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424043/normal_5f987dc421140.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/accountant_s_certificate_of_confirmation_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8da401da-22b9-45bf-ba70-89128a8e0895/signature_sound_bass_singer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94219fb1-3337-46ff-bf1b-5faf7ba2f0ae/jung_red_book_english.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/calendario_napoli_2019_20.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/99274380904.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/algebraic_fractions_worksheet_maths_genie.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/laptop_me_file_kaise_banaye.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/sekisi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bb6c629-39eb-41f5-8cb4-13e35e704c17/mipemunidor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa811b76-aeaf-470d-955b-a9223ee9e3fd/metukenideduvigejasadis.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_off0000c670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC670 5252 bytes
SHA-256: 8f5c83b33b771354575f603532cbfe1bcb6d58603acb9ac726d5c511c19230ad
font_01_sfnt_off0000d851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD851 10956 bytes
SHA-256: 99aaa45f7144f9170734f6ca155b11c3062bc99bd5ce9064d7fa06120d9a6a70

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