Malicious PDF — malware analysis report

Static analysis result for SHA-256 44a92e71194cf233…

MALICIOUS

PDF

78.3 KB Created: 2021-01-14 23:31:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: f17650cb20794a82ab3a99e2bf1aba47 SHA-1: 2915d9dc0098683175f513ad2100cde3236dd2c8 SHA-256: 44a92e71194cf2337e37fb25a8b1f9d64d7c197a332e48e57aa28494d10b9921
162 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 'traffking.ru'. The document body, though heavily obfuscated, contains text fragments that suggest an urgency lure, such as 'account will be terminated' and 'action required within 24 hours'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of a malicious redirector link indicates an attempt to lead the user to a phishing or malware distribution site, consistent with a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traffking.ru/aws?utm_term=legit+formal+dress+websites In PDF document text
    • https://static.s123-cdn-static.com/uploads/4458413/normal_5fddb6d5e68ea.pdfIn PDF document text
    • https://site-1176114.mozfiles.com/files/1176114/corrugated_box_manufacturers_in_usa.pdfIn PDF document text
    • https://site-1177660.mozfiles.com/files/1177660/electric_circuit_simulator_free_download.pdfIn PDF document text
    • https://site-1168006.mozfiles.com/files/1168006/paypal_vs_apple_wallet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366961/normal_5f974811efdde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368221/normal_5fc01c06374ae.pdfIn PDF document text
    • https://site-1166655.mozfiles.com/files/1166655/jixon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480383/normal_5fb6c4ccbed79.pdfIn PDF document text
    • https://site-1175108.mozfiles.com/files/1175108/masha_and_the_bear_educational_games_online.pdfIn PDF document text
    • https://site-1174146.mozfiles.com/files/1174146/rose_gold_runner_rug.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381101/normal_5ff4856d9b5aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367310/normal_5f9faf41d18ee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367944/normal_5fdcdcad5b8e1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416510/normal_5ff2900b653e5.pdfIn PDF document text
    • https://site-1212417.mozfiles.com/files/1212417/kobagetotonepukemazudora.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e47c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47C 5400 bytes
SHA-256: c65a49d0e599d146a0b9dbe27329a6ce76a6109723c7ab86c2e2b240f9b1064c
font_01_sfnt_off0000f6d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D0 3808 bytes
SHA-256: 6f2703c64c5737246ea2d1c16fd09c451e513b0c5f6b90e4a02ec56d1f385ca6
font_02_sfnt_off0001055a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1055A 10828 bytes
SHA-256: ee07c43f3418848d76e2dd20743016ca7a1f500359128f25f0b4e7926dc39318

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