Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc2be2e50a60b1c4…

MALICIOUS

PDF

66.6 KB Created: 2020-12-22 15:19:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 445f8e083c93455740cc85053faddd80 SHA-1: aeec3bbb65f11c1bdec28eb0f3ef5c9c42bd0415 SHA-256: cc2be2e50a60b1c4259bfb74f87bd7cf7437b8e6892ad81065be9c3ad1909307
212 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 'https://cctraff.ru/strik?utm_term=concrete+calculator+lowes'. Additionally, it features a PDF link farm heuristic, indicating a large number of external links, one of which is 'https://s3.amazonaws.com/xojafemori/quality_management_system_template_free.pdf'. The ML classifier also flagged the PDF with a high score, and ClamAV detected it as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0'. The document body is heavily obfuscated, but the presence of these indicators strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9381

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=concrete+calculator+lowes In PDF document text
    • https://zaxiradijewebox.weebly.com/uploads/1/3/4/8/134889682/fakatuked_tederutivelafij.pdfIn PDF document text
    • https://vezikiga.weebly.com/uploads/1/3/0/7/130739663/gajovabar-totino.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369933/normal_5fb6b23c0cdd7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393499/normal_5f9272ab3a1b8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xojafemori/quality_management_system_template_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bacbd295-fa77-4ad9-8015-02b8b2c93901/yolanda_desiree_catalogo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/178f008b-8bdc-47d9-aaa2-6a32a68f6d7e/good_times_bad_times_tab_rolling_stones.pdfIn PDF document text
    • https://s3.amazonaws.com/zafirawit/in_search_of_answers_destiny_2_walkthrough.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/738ad300-5481-4cae-b170-e456cecfe025/52632852682.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca9ebef2-52f2-41f3-8449-3379ae4f5a60/car_gear_shift_knob_products.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/chinese_collar_t_shirt_template.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dde0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE0 4788 bytes
SHA-256: 783c4b791419c64571789aebe47206400ff3889fc063cc1026341f4a7eba9370