Malicious PDF — malware analysis report

Static analysis result for SHA-256 147ef3691a99118f…

MALICIOUS

PDF

45.7 KB Created: 2020-10-03 04:31:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ed255776b3cc0feb60e9106e4ae58c74 SHA-1: 741ef2f14a4a26335057e43e190c8fce64546ee1 SHA-256: 147ef3691a99118f8087ade372c36c46f169f557c03390edad05c56aa3b3595a
94 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, specifically the URL https://cctraff.ru/strik?keyword=sunday+bloody+sunday+chords. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to lure the user to a malicious site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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?keyword=sunday+bloody+sunday+chords In PDF document text
    • https://site-1040764.mozfiles.com/files/1040764/fotuwejisobuxibenidated.pdfIn PDF document text
    • https://site-1040278.mozfiles.com/files/1040278/77847563442.pdfIn PDF document text
    • https://site-1041291.mozfiles.com/files/1041291/60108002535.pdfIn PDF document text
    • http://jokubib.messinaphotos.com/uploads/1/3/1/3/131383377/tatejavexiriw-jadomaweriguj.pdfIn PDF document text
    • http://files.flintcrossfit.com/uploads/1/3/0/8/130814349/165b839327f1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8116/3157/files/nuclear_medicine_dose_calibrator_for_sale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6044/2774/files/75430675484.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a26bc84-ea61-4f3d-bb5a-91956b125f00/98746768698.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f51b10d5-10a6-4faa-9821-49586e91b087/wimekejemujejigubupeju.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005dbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DBF 5008 bytes
SHA-256: f1bfb78b0a54f5c655b9f0afa69603c86128d2708066d75f825f6f12aec11a70
font_01_sfnt_off00006ea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA2 14604 bytes
SHA-256: 73cc1c23c2a924c8c13863d7786f836b1fee615263e211d14a9e10696aad6db1
font_02_sfnt_off00009c24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C24 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2