Malicious PDF — malware analysis report

Static analysis result for SHA-256 18dd0496b7726882…

MALICIOUS

PDF

62.1 KB Created: 2020-12-05 14:27:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 5487d5a3e625cc19f9d8f8de35f2b1f4 SHA-1: 190277c0036900c82735ccf379d342cfc48fc86e SHA-256: 18dd0496b772688244f4bb5a4b9aa0bb3de5f915b108919c4d3cce642c316500
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL 'https://cctraff.ru/strik?utm_term=ac+61-65h+faa' is the primary indicator of malicious intent. While no scripts were extracted, the PDF structure and the malicious URL strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://cctraff.ru/strik?utm_term=ac+61-65h+faa In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/lozixaripepijofusulexo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd2277e7fdc9583a9bb4f2/1606230649949/hey_soul_sister_lyrics_1_hour.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6516b600-de2f-48b3-a1f8-9cc13b3060e8/16922306570.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbffb205e8e827d4288adb3/t/5fc3d03b173fb5383b180d66/1606668348230/gurul.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5211dec917750a3f31b0b/t/5fc8903013de6e79815dc5a1/1606979632886/cake_icing_design_ideas.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc585a93dfdd95b60f46c9e/t/5fc739bcb2fa4660c8d005d0/1606891966323/fojavimoguxipazexedobe.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0012c12facd59cea80d2a/t/5fc219079d79364840d57692/1606555913035/pilogufimepoluzizota.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/55427394306.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc59ab6084698658e7e4eec/t/5fc89ff2217b3604ede10aec/1606983666971/cross_stitch_free_patterns.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd202fda6d74665ac736c5/1606230065705/freefall_tournament_unblocked_at_school.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5923a97599144eee9b48/1606375716244/mso.dll_crash_office_2013.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc553872e537a05ef266587/t/5fc682fcf3de5e49b54763e8/1606845181148/steamer_for_baby_food.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9ec6ec8-ae0d-4c1d-b6fa-1888de51ba87/double_entry_accounting_template_excel.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_off0000b70d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB70D 5016 bytes
SHA-256: 85643ada15859f00b0b4a8aa3c2b9dd52900b1ee157a0d453dbe58aa9d34e40e
font_01_sfnt_off0000c836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC836 9964 bytes
SHA-256: d6b36dc35963e60702bf13bf4ffeefcfb0bdd98c2a3eb0f449f888c16d1925c9

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