Malicious PDF — malware analysis report

Static analysis result for SHA-256 221e673f2c0ac1e2…

MALICIOUS

PDF

70.1 KB Created: 2020-12-19 10:52:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: acdf0a1e2561c4012a37007af52251b3 SHA-1: 73be5dd89709369ca7308ebdf6f77d2b0f71653d SHA-256: 221e673f2c0ac1e2fb0e28cccf30f53c4323aa1f393cfe0c73a36a8f8bb97136
174 Risk Score

Malware Insights

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

The file is a PDF containing a link to a known malicious redirector URL, traffmen.ru. This indicates a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://traffmen.ru/aws?utm_term=farmer%2527+s+wife+quilt+templates+condensed In PDF document text
    • https://static.s123-cdn-static.com/uploads/4413701/normal_5fc53e000366d.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/80956268-9b23-43e7-971a-7d13c8e04521/blank_answer_sheet_1-150.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5d5d111f6a41984a77cd7/t/5fd00a7f470abf4ba8fa1a06/1607469696159/playground_near_me_walking_distance.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc55f6d5bcb0228a2a0640f/t/5fc81d9726a3037b432f0351/1606950297909/61591420104.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/sedidutomolufasefaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6163919e-aa2d-4bd2-820c-3ad7eabd77fd/ramirenipemefab.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcee12c7afe470b554fa87/1606217234646/florida_drivers_license_test_2015.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19e76bf1-e271-48de-8423-c0ac5f0429be/80129289662.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/bibexibisejiwesapolat.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc573de40f1034a5cc7851a/t/5fcbe7138dcc5603be01efdd/1607198483861/spaceflight_simulator_1._51_apk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7b0708651a04751998254/t/5fd18c021693665fc7cb26b0/1607568387343/r_b_music_2018_mp3_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc011b424b06a7eb3fa7d30/t/5fcb3fc67ab0f364aba96e95/1607155655145/20486985285.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e078a04-fd43-467b-9667-8b014a297639/nazi_zombies_portable_unblocked.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_off0000d4b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B1 5508 bytes
SHA-256: 9ae837df2c5a727d36fea76d88f3f9c9c78d382a375c7c700cfe762d901350d7
font_01_sfnt_off0000e771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE771 10708 bytes
SHA-256: ec630f394c442710fd29e406bea4a0fe488ec6c26f33a08929f4157b1af7d957

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