Malicious PDF — malware analysis report

Static analysis result for SHA-256 631be9f4313f2762…

MALICIOUS

PDF

46.3 KB Created: 2020-08-18 22:27:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: adf4a6f59ec88d8a0b7b7501809a2708 SHA-1: 0a234b76ab0e6a9bf7dc49a05285a10cc0f82d16 SHA-256: 631be9f4313f2762b15d6400e90b295c4ea94bca966c8bf29080afbc96a795b1
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=global+competitiveness+report+2018+excel', suggesting a lure to a malicious site. The presence of many external PDF links indicates a link farm strategy, likely for SEO poisoning or to distribute malware.

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=global+competitiveness+report+2018+excel
    • http://files.brskl.com/uploads/1/3/2/6/132695629/jonuvetawanisir-forupawanebuna.pdf
    • http://files.deep-learning-site.com/uploads/1/3/2/7/132741764/c3b81123cba41.pdf
    • http://xunul.nikofalltrades.es/uploads/1/3/1/3/131380265/vakewumufovinominagi.pdf
    • http://pesuruje.4elements1.com/uploads/1/3/2/6/132681352/valegutuxil.pdf
    • http://gujate.wallheathtennisclub.co.uk/uploads/1/3/2/8/132814930/134996.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/8118/6971/files/75126723118.pdf
    • https://cdn.shopify.com/s/files/1/0438/3526/1085/files/project_on_interior_design.pdf
    • https://cdn.shopify.com/s/files/1/0440/0935/7477/files/dawidazisatufediwi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8095/files/satatelulepigariwezoluri.pdf
    • https://cdn.shopify.com/s/files/1/0430/2657/9610/files/18380583206.pdf
    • https://cdn.shopify.com/s/files/1/0437/6189/3534/files/womisabiwe.pdf
    • https://cdn.shopify.com/s/files/1/0448/1168/1958/files/the_art_of_storytelling_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/8714/9733/files/john_deere_lt133_parts.pdf
    • https://cdn.shopify.com/s/files/1/0429/0890/9734/files/anaerobic_digestion_processes_in_industrial_wastewater_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0431/4379/0760/files/90602199280.pdf
    • https://cdn.shopify.com/s/files/1/0447/0043/4586/files/54358502826.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_off00007414.bin
693d3d747ee9d6fd62b9d265582696d67bc9b9e5e02bc2cbe4fe1afd4183ea3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7414 5900 bytes
font_01_sfnt_off00008822.bin
b2f9ab1cef8d51e82f51ee86e2d8ff029a99aca28c8193e9d709bb671959e391		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8822 10628 bytes

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