Malicious PDF — malware analysis report

Static analysis result for SHA-256 073bad1d37198f79…

MALICIOUS

PDF

43.7 KB Created: 2020-08-30 14:57:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90f74ef0cb5743034741bc4eea940fbe SHA-1: 45f9aff871843bdf33ba04c96c2cd41f7c015681 SHA-256: 073bad1d37198f79fe37b6ff4fc4e9fad18b748c912f6fbe16dbb15dcd44c310
154 Risk Score

Malware Insights

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

The PDF file contains embedded links, one of which, 'https://ttraff.ru/wix?keyword=venda+de+casas+em+cevico+da+torre+pl', is flagged as a malicious redirector. The file also exhibits characteristics of a PDF SEO link farm, containing numerous links to external PDF documents, suggesting an attempt to manipulate search engine results or distribute content. The ML classifier strongly indicates maliciousness, and the overall structure points to a phishing or redirection scheme.

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/wix?keyword=venda+de+casas+em+cevico+da+torre+pl
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/5616/0151/files/embarrassing_moments_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0437/9040/1687/files/watermark_in_acrobat.pdf
    • https://cdn.shopify.com/s/files/1/0436/2177/7570/files/scultura_greca_arcaica.pdf
    • https://cdn.shopify.com/s/files/1/0459/3126/6215/files/gimowadelidajavuduv.pdf
    • https://cdn.shopify.com/s/files/1/0431/5440/7578/files/honda_fourtrax_300.pdf
    • https://static.usrfiles.com/ugd/d54300_977a60ff066c428ca1a2849b81c91111.pdf
    • https://static.usrfiles.com/ugd/9c43ec_52fd777d007840a484984122368c2a4d.pdf
    • https://static.usrfiles.com/ugd/b6edda_1acabc6b0ace48aaa32e02b503866677.pdf
    • https://static.usrfiles.com/ugd/b8c837_c8c1b7c2300c4639b99ccf2f4fdb7625.pdf
    • https://static.usrfiles.com/ugd/b8c837_da1b1a8103a14a45aa0ef5dd491053d8.pdf
    • https://cdn.shopify.com/s/files/1/0439/3458/0891/files/3d_models_free_for_blender.pdf
    • https://cdn.shopify.com/s/files/1/0432/0342/8510/files/manual_j_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/7936/8858/files/xobonaxixi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6980/8550/files/juzorolawoxurul.pdf
    • https://cdn.shopify.com/s/files/1/0428/3518/1734/files/binebiwefuwud.pdf
    • https://cdn.shopify.com/s/files/1/0438/8985/2568/files/model_aircraft_aerodynamics_simons.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000590a.bin
6d102bd3e0517d8f46f0532148780d41de697e418837b0fa08c193b835c539e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x590A 5032 bytes
font_01_sfnt_off00006a0b.bin
9f40e06b269f122d9b440afe29db3ef98203f4f6a1547a4d13883584f01842d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A0B 13068 bytes
font_02_sfnt_off00009238.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9238 4324 bytes

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