Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f19ffdd7fc11dc3…

MALICIOUS

PDF

541.7 KB Created: 2020-10-20 12:15:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 070ff0a75d19a86af1c44109e47b2f1c SHA-1: 6fb7a0fc5b8285f03d0384b371e487cc222849cb SHA-256: 2f19ffdd7fc11dc3910245b3ce638db8c3643dc29a219b23af28955c41a1e372
102 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is presented as a download for 'Ramesh babu dsp pdf free download'. The ML classifier also flagged this PDF as malicious. The presence of a malicious redirector URL strongly suggests an attempt to deliver a second-stage payload, likely malware, to the victim.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9405

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ttraff.ru/123?keyword=ramesh+babu+dsp+pdf+free+download
    • https://cdn-cms.f-static.net/uploads/4387571/normal_5f8ce9b523070.pdf
    • https://cdn-cms.f-static.net/uploads/4371543/normal_5f8e1d740dd9f.pdf
    • https://cdn-cms.f-static.net/uploads/4368227/normal_5f8a46e32ee8b.pdf
    • https://cdn-cms.f-static.net/uploads/4366377/normal_5f87352cd42c2.pdf
    • https://cdn-cms.f-static.net/uploads/4372085/normal_5f88879b8d16e.pdf
    • https://cdn-cms.f-static.net/uploads/4369646/normal_5f8b451fa88a1.pdf
    • https://cdn-cms.f-static.net/uploads/4368767/normal_5f8b2ca53d29a.pdf
    • https://cdn-cms.f-static.net/uploads/4369166/normal_5f87c92e0e211.pdf
    • https://cdn-cms.f-static.net/uploads/4388067/normal_5f8e86681f380.pdf
    • https://pisanofinupu.weebly.com/uploads/1/3/1/4/131437881/7adfe66.pdf
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/wovexofek.pdf
    • https://segakimorepej.weebly.com/uploads/1/3/0/7/130738797/tejogasujotagunof.pdf
    • https://mogijoduvide.weebly.com/uploads/1/3/0/8/130814471/nibowozodi_raman_xuwebovojevokom.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f6ba20df-4ead-429e-88b4-a7e04f75a020/giwanafavupul.pdf
    • https://uploads.strikinglycdn.com/files/6218f84b-3f06-42a2-b7ad-41d4aacdc81d/domuguni.pdf
    • https://uploads.strikinglycdn.com/files/49f69850-08d1-41dd-83d0-096a0ae3d8c8/86270749535.pdf
    • https://uploads.strikinglycdn.com/files/6dc71d63-30fe-49a0-a765-4840713c7706/exemple_biographie_artiste_musique_p.pdf
    • https://uploads.strikinglycdn.com/files/066edfdf-c6cb-4102-8f66-4dbfd2098b3e/zefiborikotimenesotunu.pdf
    • https://cdn.shopify.com/s/files/1/0501/4667/2805/files/que_es_un_sistema_de_control_en_una_empresa.pdf
    • https://cdn.shopify.com/s/files/1/0484/0931/3438/files/generic_drug_product_development_bioequivalence_issues.pdf
    • https://cdn.shopify.com/s/files/1/0439/0807/1576/files/jifizipotisidobawuxalidi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5576/files/nuduz.pdf
    • https://cdn.shopify.com/s/files/1/0480/9329/8851/files/archeage_shadowblade_guide.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_off000818e6.bin
513b3286dd9ef1d93d8de3f9673e31a4968e4f2232419a19ba0c29462434e338
pdf-font-stream PDF embedded font (sfnt) at offset 0x818E6 5520 bytes
font_01_sfnt_off00082b9e.bin
c2d11fe14b50df77d38ba0a3db1cc3438d688a6d0a7abc33714c0c7a257bd86c
pdf-font-stream PDF embedded font (sfnt) at offset 0x82B9E 18832 bytes