Malicious PDF — malware analysis report

Static analysis result for SHA-256 7557a9e9280338b5…

MALICIOUS

PDF

67.3 KB Created: 2020-12-22 21:34:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 89ffa5b3a44119f1184c3296318999da SHA-1: 8191c226b8dad9452bc26e0cab19cab758478896 SHA-256: 7557a9e9280338b54ee974f20bf68bf72685f321919287aa76a58fad7d0ff6c9
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 'gettraff.ru'. This indicates an attempt to lure the user to a malicious site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the redirector suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gettraff.ru/aws?utm_term=airdrop+android+to+apple In PDF document text
    • https://cdn-cms.f-static.net/uploads/4417537/normal_5fa1602f47f44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503050/normal_5fd11ede6ff15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376101/normal_5f9d14a95006e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383467/normal_5fad398dd4574.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424637/normal_5fa34518dba33.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/buganabowumujef/pakezorenuwududamu.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/39682093243.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/cardiovascular_physiology_mcqs_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/run_4_vevo_unblocked_games.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/pegavojojevovegojumomiz.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/telugu_movies_2018_hd_moviesda.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/25286694910.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_off0000cd0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD0B 4764 bytes
SHA-256: db9da1abc402773502a4f250b55de41a21cde76ff6ba07c44698788f91b07f95
font_01_sfnt_off0000dd4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4B 10460 bytes
SHA-256: cd40a92c3597ccbce9e8b314f82b96a43bf66ad1dd295c14f19ec1af82252e70

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