Malicious PDF — malware analysis report

Static analysis result for SHA-256 22a1dcc6110dd8de…

MALICIOUS

PDF

90.4 KB Created: 2021-01-02 13:20:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: ddc2fd5cc6545cd89a168ad4602e21f4 SHA-1: a4d4cb7989a4863bb51fab322e15e95c534ad8aa SHA-256: 22a1dcc6110dd8de4436c90e06ec88a9cefe4a5f352aed54c84a140f9c8f569a
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/aws?utm_term=videoshow+pro+gratis'. This, combined with the ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' and the ML classifier's high confidence, strongly suggests a phishing attempt designed to redirect users to malicious infrastructure. No scripts were extracted, but the presence of embedded URLs and the nature of the heuristics indicate a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/aws?utm_term=videoshow+pro+gratis In PDF document text
    • https://cdn.sqhk.co/sugifila/icghBhi/14436990302.pdfIn PDF document text
    • https://cdn.sqhk.co/sisalubitot/U7IoI09/zorajijipufepovokobebi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379968/normal_5fcb9f433e28d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403680/normal_5f9c68bfd21b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478928/normal_5fad882de11a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482629/normal_5fee3de6f29d2.pdfIn PDF document text
    • https://cdn.sqhk.co/lozuzupadis/heKRWZc/26673295546.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427313/normal_5fe40ec83d66d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386839/normal_5fc8c636a7bcf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454561/normal_5fe2531cd001a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491414/normal_5fe6023089adf.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/xovekolamoxe/xoxiwujijipoxisuwinevagab.pdfIn PDF document text
    • https://s3.amazonaws.com/jasipefulaxiduj/kojas.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/livro_cantigas_trovadorescas.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/pokemon_theme_lyrics_english.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/coommonly_ocnfused_words_greenwhich_high_school.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1B 5248 bytes
SHA-256: cec0acb11c66fbb54f630059b9f865b822fe4bfadc14ff209f7efef053f68ff0
font_01_sfnt_off00011e04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E04 11892 bytes
SHA-256: f16e416d20029317bb4a3a478cf05aa91adca89df522c38fbdfdfde3d210fc25
font_02_sfnt_off000145d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145D1 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848

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