Malicious PDF — malware analysis report

Static analysis result for SHA-256 d524d26f4c8b47c4…

MALICIOUS

PDF

75.6 KB Created: 2020-12-19 22:42:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8609ce8ace571e54aba6c43892ad7791 SHA-1: 1a8d684b952f3af5147bd295db78197c37f3c1f4 SHA-256: d524d26f4c8b47c46129cd7b3c514480b34bea2e6082dffe59ee3256d23b378e
214 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a redirector link and a link farm. The embedded links, such as https://cctraff.ru/strik?utm_term=badminton+activities+for+beginners, likely lead to phishing or malware distribution sites. The presence of numerous external links suggests an attempt to manipulate search engine results or direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=badminton+activities+for+beginners
    • https://cdn-cms.f-static.net/uploads/4381105/normal_5fd9bfcb4aa7c.pdf
    • https://tabupuja.weebly.com/uploads/1/3/4/6/134647436/20cef91d55d.pdf
    • https://cdn-cms.f-static.net/uploads/4378852/normal_5f9c736bcff59.pdf
    • https://cdn-cms.f-static.net/uploads/4410204/normal_5fd1f1659830f.pdf
    • https://ruwalabipuges.weebly.com/uploads/1/3/4/4/134465281/553ca4be17a1630.pdf
    • https://cdn-cms.f-static.net/uploads/4482858/normal_5fa6d4c125475.pdf
    • https://cdn-cms.f-static.net/uploads/4370528/normal_5f8b6ee5ab67d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4f04d68b-7c7c-4ca9-8d0b-f0df31962de4/cinco_ranch_cougar_band_facebook.pdf
    • https://static1.squarespace.com/static/5fc0ecedbf71053ccb1052a5/t/5fc30992f8cdb769c64782a8/1606617492045/delnor_community_hospital.pdf
    • https://uploads.strikinglycdn.com/files/a53258f9-2596-4b56-ae43-95a4afa139b8/midogexunifabozowepo.pdf
    • https://static1.squarespace.com/static/5fdd2b976394b41d6424bdfb/t/5fde37107f4e6a3367199d33/1608398609171/52078396469.pdf
    • https://uploads.strikinglycdn.com/files/74d20d1c-d33e-4f1b-a812-3d9bc079f7ce/wujitoxetonavonukupevetox.pdf
    • https://uploads.strikinglycdn.com/files/9687f1c7-ebd7-4948-9952-4f1500750b21/34212803259.pdf
    • https://uploads.strikinglycdn.com/files/2c99efb7-770e-4ccf-a08e-6754262470f8/99920950645.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e92e.bin
41b9501af8f33794f0928d258453c414c02312b76b8e8cd5fce848f47bf8cae8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE92E 5560 bytes
font_01_sfnt_off0000fc0b.bin
b53117aa7d46c185dda7349a1fb78b05096d283e6862cefef92c77f72a0e402e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0B 10392 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.