Malicious PDF — malware analysis report

Static analysis result for SHA-256 2634c174588c2d31…

MALICIOUS

PDF

83.9 KB Created: 2020-12-15 11:03:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: de026977298850c0e36f9385db9a87ab SHA-1: 5959e56c740c78b3bfe8e961b43c6d120e069c39 SHA-256: 2634c174588c2d3144b9332d33de0c04d69139560ffbe12843076b7b1f1299ad
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link to 'traffking.ru'. This, combined with a high ML classifier score and ClamAV detection, strongly suggests malicious intent. The embedded URL is likely used to lure the user to a phishing site or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffking.ru/123?utm_term=skyrim+sanguinare+vampiris+vs+vampire+lord In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365646/normal_5f8c44018aba5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375890/normal_5f8dfeec212c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467285/normal_5fcd0a0262751.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374698/normal_5fd7a4f9e4346.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459629/normal_5fad2d577f978.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381766/normal_5fc6ca7c8d6cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391896/normal_5f9147d3898ee.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/abf4796a-f928-413d-a4f8-12d36690c708/24005088817.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/feb8e1d0-a1e9-47cf-b790-c2464dcebb96/99_cent_stores_near_me_now.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/vajowajuruvevas.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/78198031721.pdfIn PDF document text
    • https://s3.amazonaws.com/vajefam/sword_coast_adventurer_s_guide_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/107ac8c6-41d0-495d-ba51-69ce31f67060/forever_dawn.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/microsoft_excel_protected_sheet_forgot_password.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_off000107c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C2 5608 bytes
SHA-256: f43422cc8eb6f57c1bc79744d08b24735d5393303abf1862f3996bb444a530da
font_01_sfnt_off00011ad5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD5 12288 bytes
SHA-256: 3de081a76d18953907011abef26356452318c1b2ae2332d8788ff557e8723103

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