Malicious PDF — malware analysis report

Static analysis result for SHA-256 b94529f2d6b09dc7…

MALICIOUS

PDF

44.7 KB Created: 2020-08-10 18:27:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca54a32d67fadd1dd7d1f86f71d3eca2 SHA-1: 9518fb8ecd4739d19375e7044e561d9749646367 SHA-256: b94529f2d6b09dc77dbc397e2ffa1d5bb56c90e7560e6d57a4d5e8f1d9ca488c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically 'ttraff.ru'. The document body also contains this URL, suggesting it's the primary lure. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs pointing to Shopify domains, likely for SEO manipulation or to host further malicious content. The ML classifier strongly supports the malicious verdict.

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/pify?keyword=fusionner+deux+documents+pdf+creator
    • http://files.creekdontriseband.com/uploads/1/3/1/4/131453858/224359.pdf
    • http://files.thesolidrockshop.com/uploads/1/3/0/8/130813797/zaxisufibuxuxigusi.pdf
    • http://files.wordoflifemn.org/uploads/1/3/1/3/131383664/c46844bde5dd.pdf
    • http://nejexodu.vybephotography.com/uploads/1/3/1/0/131070420/bapabopudenulewom.pdf
    • http://files.sanctuaryofgrace-in.org/uploads/1/3/1/6/131606128/tumipividuxusu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0939/2285/files/fufamimebarof.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dazexirorojukulovamedifuv.pdf
    • https://cdn.shopify.com/s/files/1/0434/2297/4117/files/81412303413.pdf
    • https://cdn.shopify.com/s/files/1/0433/5045/8520/files/trove_golden_soul.pdf
    • https://cdn.shopify.com/s/files/1/0435/3009/2696/files/99609343715.pdf
    • https://cdn.shopify.com/s/files/1/0438/0544/2209/files/21382962634.pdf
    • https://cdn.shopify.com/s/files/1/0428/5287/6455/files/76879790721.pdf
    • https://cdn.shopify.com/s/files/1/0450/1697/3476/files/barreras_fisicas_en_la_comunicacion.pdf
    • https://cdn.shopify.com/s/files/1/0432/7863/1072/files/11304992933.pdf
    • https://cdn.shopify.com/s/files/1/0438/4748/3552/files/47313278768.pdf
    • https://cdn.shopify.com/s/files/1/0440/8298/7158/files/design_of_machine_elements_8th_edition.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d67.bin
e634eb1a92df43b91b849e3ae596a51e94ef7d28c171e0c2c5f0d0190affc4d5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D67 5292 bytes
font_01_sfnt_off00007f4e.bin
ee9c88c621d674b15c14d37b1b5d9901cf47d7accb1767945b500820a41fa08a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F4E 11644 bytes