Malicious PDF — malware analysis report

Static analysis result for SHA-256 00040b1ea5d625bf…

MALICIOUS

PDF

41.2 KB Created: 2020-11-01 18:31:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bac0bfbf394cccb941d735e7ed833aa3 SHA-1: 768409001f58126edfd4134536836306dff60d75 SHA-256: 00040b1ea5d625bf7111fc59994a5b6a81ee22c3a499907c583524eb7a616f4c
94 Risk Score

Malware Insights

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

The PDF contains a link that redirects to the known malicious URL 'https://cctraff.ru/aws?keyword=bowman+2+free+game'. This URL is presented as a lure for a 'free game', indicating a social engineering tactic to entice users to click. The ML classifier also strongly flagged this PDF as malicious.

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/aws?keyword=bowman+2+free+game
    • https://cdn-cms.f-static.net/uploads/4369307/normal_5f8e6d9f0095d.pdf
    • https://cdn-cms.f-static.net/uploads/4421213/normal_5f9cd5a3baa3f.pdf
    • https://cdn-cms.f-static.net/uploads/4369189/normal_5f89ac6482b08.pdf
    • https://cdn-cms.f-static.net/uploads/4408589/normal_5f932926e73f9.pdf
    • https://cdn-cms.f-static.net/uploads/4366633/normal_5f8cfb219605d.pdf
    • https://cdn-cms.f-static.net/uploads/4409250/normal_5f98ec2cad825.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0499/3656/4375/files/patotixuzumabalibepi.pdf
    • https://uploads.strikinglycdn.com/files/ab3d04b3-c1e4-4e04-9774-d9681f473482/ecology_quiz_worksheet_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0429/3358/4035/files/lemorojowuxixakisawupuj.pdf
    • https://uploads.strikinglycdn.com/files/c4056e65-a5d3-4503-89e4-fe88127aa788/forem.pdf
    • https://cdn.shopify.com/s/files/1/0501/7174/0320/files/22271531779.pdf
    • https://uploads.strikinglycdn.com/files/217d1f44-f80f-449b-a7c6-025c0fe17bb8/15342130922.pdf
    • https://cdn.shopify.com/s/files/1/0501/4106/9505/files/79519280621.pdf
    • https://cdn.shopify.com/s/files/1/0498/4202/8706/files/rapofanatadamusidebabi.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_off000062a8.bin
3513648c3522c1833821bf3aac342c846cc4b643c91956ff1d37799d7e2aaa00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62A8 5148 bytes
font_01_sfnt_off00007431.bin
f23df4a199b7cbafb5ce671b8d4e7c9936d189ee7a68edefaf10dbe785a5c6b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7431 10716 bytes

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