Malicious PDF — malware analysis report

Static analysis result for SHA-256 609f4102e75aaefe…

MALICIOUS

PDF

39.3 KB Created: 2020-08-23 13:15:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f8af4074812bb6d597118be57edb798 SHA-1: ffe3353e613018a0472d2cdb01da78d05826f4bb SHA-256: 609f4102e75aaefe8150914b0aadb299ed2d2b6edcbf5d299e94a3f1426ef0f8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to known malicious infrastructure, disguised with text related to an IMF report. It also hosts a large number of external PDF links, many of which point to Shopify, suggesting a link farm or SEO manipulation tactic. The primary malicious URL is ttraff.ru, which is flagged as a redirector.

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=imf+world+economic+outlook+report
    • http://files.tbirmingham.com/uploads/1/3/0/7/130776407/85462b427a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/2014/7095/files/zikififugufasurevimoxak.pdf
    • https://cdn.shopify.com/s/files/1/0454/3102/9918/files/dslr_camera_app_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0448/1767/8497/files/ammonium_sulphate_fertilizer.pdf
    • https://cdn.shopify.com/s/files/1/0434/6282/0005/files/65124868911.pdf
    • https://cdn.shopify.com/s/files/1/0433/1828/0357/files/kigitopilorexitofem.pdf
    • https://cdn.shopify.com/s/files/1/0430/5040/1943/files/developing_skills_for_the_toefl_ibt_intermediate_speaking.pdf
    • https://cdn.shopify.com/s/files/1/0435/9595/6386/files/89621603856.pdf
    • https://cdn.shopify.com/s/files/1/0440/7430/3640/files/kiadb_building_bye_laws.pdf
    • https://cdn.shopify.com/s/files/1/0432/6293/5200/files/navision_c_al_format_function.pdf
    • https://cdn.shopify.com/s/files/1/0431/8117/9048/files/duvapokuze.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_off00005ba9.bin
baa2ab5bd9a0e83c701ef8aaf97c224b7eef97bea7ee495cc003a9eafd95d625
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BA9 5004 bytes
font_01_sfnt_off00006cab.bin
b29e017ca6c520d6581f321fe65cb3a1480fde6ef93bda0e0448a0e2c761a9a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CAB 10104 bytes