Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ba166b0b30a8aaa…

MALICIOUS

PDF

35.6 KB Created: 2020-08-13 19:30:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8895e230c07d6d140f0b3d503f1debb SHA-1: 1d2f2bfab4c49032a345ef0e09283c60b959621e SHA-256: 5ba166b0b30a8aaae9fa0ad5605786b39d2f02f815bfb35f865066ba23b5e9da
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://ttraff.cc/wb?keyword=pdf%20sociologie%20rurale'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, including one to 'https://cdn.shopify.com/s/files/1/0431/3550/0439/files/bujimuxekepovisiduberupo.pdf'. The ML classifier also strongly flagged this PDF as malicious. The embedded URLs suggest an attempt to lure users to external sites, likely for phishing or to download further malicious content.

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.cc/wb?keyword=pdf%20sociologie%20rurale
    • http://nuwobix.tristatefit.com/uploads/1/3/0/9/130969744/naboromul_vewojawut_rutijijowuzefa_girov.pdf
    • http://files.preciousmomentslivebymichelle.com/uploads/1/3/0/7/130776324/tagediwifoxumamataro.pdf
    • http://files.danieleheon.com/uploads/1/3/1/6/131637190/kariwize_jefigi_xonevo_gijipoze.pdf
    • http://files.katiebland.com/uploads/1/3/1/8/131856065/9334111.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3550/0439/files/bujimuxekepovisiduberupo.pdf
    • https://cdn.shopify.com/s/files/1/0435/8098/1403/files/git_all_commands.pdf
    • https://cdn.shopify.com/s/files/1/0429/3387/8940/files/nigagujoga.pdf
    • https://cdn.shopify.com/s/files/1/0431/1610/1798/files/dabosukiwawemulu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3269/9302/files/53822256083.pdf
    • https://cdn.shopify.com/s/files/1/0427/7141/5196/files/sonic_world_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/3987/4462/files/difference_between_film_coated_and_enteric_coated_tablets.pdf
    • https://cdn.shopify.com/s/files/1/0429/6753/1673/files/rolorikaw.pdf
    • https://cdn.shopify.com/s/files/1/0435/8995/9843/files/non_verbal_reasoning_practice_questions.pdf
    • https://cdn.shopify.com/s/files/1/0431/8402/9854/files/14623780877.pdf
    • https://cdn.shopify.com/s/files/1/0430/4666/6389/files/nigovadewu.pdf
    • https://cdn.shopify.com/s/files/1/0435/1839/4523/files/87651780803.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_off00004a25.bin
a5cedb22d2dbf89dd1afb8fd25aa47ca8767c2f217bff02eb470be02ec234b23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A25 5192 bytes
font_01_sfnt_off00005bd5.bin
c3a992fea653ea788a37873c686572fa151177be4e1919658b0bdd0e9d278a96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BD5 11144 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.