Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d0a1e887b351ee1…

MALICIOUS

PDF

46.1 KB Created: 2020-11-03 06:45:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b52878adc499fc176c356b589d6fe0f5 SHA-1: d63b0944db5f6fa6b7428cbcc52b126e82b80cb0 SHA-256: 6d0a1e887b351ee194cd20ec7217cda918b6f1dce8ee539f4752770f300522b4
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with heuristics indicating it's a link farm and a redirector to malicious infrastructure. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URL https://ttraff.ru/123?keyword=world+championship+soccer+games is a primary indicator of malicious intent, likely leading to further compromise.

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://ttraff.ru/123?keyword=world+championship+soccer+games
    • https://turomanusogagi.weebly.com/uploads/1/3/1/4/131453559/5002527.pdf
    • https://pinukavuzufov.weebly.com/uploads/1/3/4/3/134307945/3084343.pdf
    • https://vokewubepil.weebly.com/uploads/1/3/4/4/134443825/0dba36d67532.pdf
    • https://nijubalalo.weebly.com/uploads/1/3/1/4/131453980/zolejotuluton.pdf
    • https://cdn-cms.f-static.net/uploads/4379220/normal_5f8a5fcac2a3a.pdf
    • https://ditiwudo.weebly.com/uploads/1/3/1/4/131452947/xalibudi_vited_potofesazad_kodenubos.pdf
    • https://junoxavod.weebly.com/uploads/1/3/1/3/131384771/883603.pdf
    • https://cdn-cms.f-static.net/uploads/4370286/normal_5f886f983e46f.pdf
    • https://cdn-cms.f-static.net/uploads/4366367/normal_5f873a6d57c5a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tejuvonixag/occupational_therapist_resume_new_grad_fieldwork.pdf
    • https://cdn.shopify.com/s/files/1/0502/5021/9692/files/power_notes_biology.pdf
    • https://s3.amazonaws.com/bakoloj/3530964580.pdf
    • https://s3.amazonaws.com/gaxuremewuger/razor_crazy_kart_xl.pdf
    • https://cdn.shopify.com/s/files/1/0486/8256/5782/files/52937592372.pdf
    • https://s3.amazonaws.com/tizowodifi/45934178994.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_off000075e3.bin
87262bc2a07c67e2414634ee2d1590127bb04e69c067f6ef3d680914892e2087
pdf-font-stream PDF embedded font (sfnt) at offset 0x75E3 5500 bytes
font_01_sfnt_off00008873.bin
3e1d0cf3d0f352fed520e9e0f49486fc1edff6446043e1884904b9c5f32ac79b
pdf-font-stream PDF embedded font (sfnt) at offset 0x8873 10304 bytes