Malicious PDF — malware analysis report

Static analysis result for SHA-256 40fa0fdefab7bb7d…

MALICIOUS

PDF

38.6 KB Created: 2020-08-18 18:42:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 376f8a252cd5099ef232602a1d9fb7e5 SHA-1: a559a0ec897e8f3d3a576f864adef079d9820d59 SHA-256: 40fa0fdefab7bb7d3d4d43bb360a644907c257f7c715a323b2a088b042ff2406
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple embedded links, with a critical heuristic firing indicating a redirect to known malicious infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains text related to audio editing software and the malicious URL, suggesting a lure. The presence of numerous Shopify-hosted PDF links, while some are benign, contributes to a link farm pattern, likely to improve SEO for the malicious redirector. No scripts were extracted from this sample.

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.com/pify?keyword=audio+songs+editor+software+free
    • http://files.windowartgallerykingston.com/uploads/1/3/0/9/130969573/dikuladevesixuz_vuxekone.pdf
    • http://files.michaelsnowpresents.com/uploads/1/3/1/8/131856398/c17d2aea.pdf
    • http://files.newmanslibrary.com/uploads/1/3/1/4/131407695/165b92eac91d2.pdf
    • http://setenej.enterthemovies.com/uploads/1/3/0/8/130873951/b61397e60e.pdf
    • https://cdn.shopify.com/s/files/1/0429/8519/3621/files/bodyboss_ultimate_body_fitness_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/7833/6166/files/high_dimensional_data_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0437/6874/2039/files/kalovorupo.pdf
    • https://cdn.shopify.com/s/files/1/0436/3878/4158/files/daily_view_program_guide_qvc._com.pdf
    • https://cdn.shopify.com/s/files/1/0432/8770/7804/files/chaos_theory_management.pdf
    • https://cdn.shopify.com/s/files/1/0435/1442/9608/files/87552512919.pdf
    • https://cdn.shopify.com/s/files/1/0431/7285/5957/files/48964390448.pdf
    • https://cdn.shopify.com/s/files/1/0432/1057/1940/files/vrf_air_conditioning_system.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bofudajix.pdf
    • https://cdn.shopify.com/s/files/1/0438/0078/9154/files/rf_to_eu_ratio.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_off00005927.bin
b67b51ffbd2981326a2d4c5f1bf597af6ce59370cc573bac662e32aafb81a3ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x5927 5124 bytes
font_01_sfnt_off00006aae.bin
55a261e51186f23c660a5f51be5b4cedc230eac73adef8c44250fb8f446c9b82
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AAE 10308 bytes