Malicious PDF — malware analysis report

Static analysis result for SHA-256 08786d7f31c531f0…

MALICIOUS

PDF

65.5 KB Created: 2020-12-10 16:37:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c0d933231548406ea565c749144c2b1 SHA-1: d1c9f4856a638351b18a5889ecdd7c866af8892d SHA-256: 08786d7f31c531f08ac0722e3d2a933c302eb33e5f376be59dc589cb8af2294f
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 'ggtraff.ru'. This indicates the document's primary purpose is to lure users to a potentially harmful website. The ML classifier and ClamAV detection further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ggtraff.ru/aws?utm_term=hippopotamus+as+animal+spirit+guide
    • https://cdn-cms.f-static.net/uploads/4460723/normal_5fa53142caba2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/limewub/alita_battle_angel_songs_free.pdf
    • https://s3.amazonaws.com/jowutoneranemuk/laryngopharyngeal_reflux_disease.pdf
    • https://s3.amazonaws.com/fajixe/2169456294.pdf
    • https://s3.amazonaws.com/pajukovuxetu/application_forms_for_ugandan_passport.pdf
    • https://uploads.strikinglycdn.com/files/af63cd29-a260-483e-ab6c-cdc1f785c068/lefekuduzewor.pdf
    • https://uploads.strikinglycdn.com/files/5072e24a-bc29-4f5b-82fd-b7cc240ef436/vevazijate.pdf
    • https://uploads.strikinglycdn.com/files/26d33819-b9e1-4e27-9422-4a15ed57e2eb/lifigipizujidadid.pdf
    • https://s3.amazonaws.com/xubifupi/brand_awareness_research.pdf
    • https://s3.amazonaws.com/sugaguxagu/application_letter_for_university.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4c3.bin
3877657e02a0e4e28a154b41764f8ac1ad5de52c7476eb6ca444c7fd3a476283		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4C3 5240 bytes
font_01_sfnt_off0000d675.bin
0bc688d81ab1f3c10171aa23c0b721ed3816c6fd7fabd4f0582251af0c394c29		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD675 10188 bytes

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