Malicious PDF — malware analysis report

Static analysis result for SHA-256 be2472a3994e3fb4…

MALICIOUS

PDF

38.1 KB Created: 2020-10-10 10:12:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: e135fcc569fd6d79c72f86eb2915c899 SHA-1: a7a89c3e537ab70d924cd310e52aec998a1fa84d SHA-256: be2472a3994e3fb49023dfbc535efff515fbebc9102291a948c3b36f77cde852
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector infrastructure, specifically advertising a "real drone simulator apk". The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links, many with numeric slugs, suggests a link farm or SEO poisoning tactic. The primary malicious URL identified is https://cctraff.ru/strik?keyword=real+drone+simulator+apk, which is likely the entry point to a further malicious download or exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=real+drone+simulator+apk In 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/5597b381-3bdb-4578-a61b-0aae8cd65dab/35909378207.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dff885c8-8f32-4513-ad92-2db428409727/sewesebabipunokidatexe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba3fc250-aee4-4dad-82ec-4dcfe4251935/28010922706.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3712d643-4724-4899-bd71-dcdc51f3dc13/rimojulevinofileluzojudi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d24bfa28-5bef-4213-b950-3582214b5f89/17817668619.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2881/5261/files/nist_sp_800-61.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8454/0823/files/39172226909.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/3442/3708/files/46169767545.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6769/9111/files/whirlpool_quiet_partner_iii_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2040/1316/files/dofevudixajoma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7897/5639/files/51725878023.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8559/7346/files/donald_ross_actor_wives.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2830/1989/files/oot_randomizer_tracker.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_off00004966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4966 5176 bytes
SHA-256: 8928efba542ed69e98fca4485649d4cc6ada972a972173993fc680a2b83569ae
font_01_sfnt_off00005ae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE6 2904 bytes
SHA-256: 5bba30cdd1a7c684bf5186f5fdc257ccc3d741fb2630abbe87c5911008a431ac
font_02_sfnt_off000066dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66DC 11068 bytes
SHA-256: 7f3498817026a5228c1ca2510b5f10abf8ced7f43ebf589d09d71a304fd12419

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