Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0a609dd5c9e3f5c…

MALICIOUS

PDF

47.0 KB Created: 2020-09-02 00:11:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f98fbf1c8a358c226937bd3af5ade95b SHA-1: abeffb27e355b867a9f88c118c18ec1b3bc94b1b SHA-256: f0a609dd5c9e3f5c72a90e3baa9945de6a45c87ca78d374b9242e753342dbe60
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to deliver further malicious content. The document body, though heavily obfuscated, contains the same URL and keywords suggesting a lure for search engine optimization. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is part of 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=aluminium+sheet+suppliers+perth
    • https://cdn.shopify.com/s/files/1/0431/0958/0961/files/pusez.pdf
    • https://cdn.shopify.com/s/files/1/0433/4888/5662/files/11614633469.pdf
    • https://cdn.shopify.com/s/files/1/0461/7705/8969/files/nitumawudujemisax.pdf
    • https://static.usrfiles.com/ugd/73c254_6a78aae0f41e478abb8157da2716db9e.pdf
    • https://static.usrfiles.com/ugd/b8c837_d87dc9b5f3774e669f2bb99c3cbc1a74.pdf
    • https://static.usrfiles.com/ugd/d4579c_0f7d054f33b344fca46e4ea5ee49336b.pdf
    • https://static.usrfiles.com/ugd/8b2c09_44afb05ff0f249a2859e121c63f0833f.pdf
    • https://static.usrfiles.com/ugd/97634b_0bd0a36d36f34cf98f684826d428d8c9.pdf
    • https://static.usrfiles.com/ugd/aec2ea_98870834b262476b9f9e5bdc10fa77fe.pdf
    • https://cdn.shopify.com/s/files/1/0437/8502/7745/files/space_engineers_mes_settings.pdf
    • https://cdn.shopify.com/s/files/1/0430/9424/5537/files/wisotevepipape.pdf
    • https://cdn.shopify.com/s/files/1/0439/9579/1518/files/input_file_accept_doc_docx.pdf
    • https://cdn.shopify.com/s/files/1/0428/2010/8455/files/zebufibitalebigugodagekin.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d30.bin
29931cfeb5999426e595c428a8f6f8ac3c459cc9ba209ee2ce32d4fc9426b1b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D30 4840 bytes
font_01_sfnt_off00006d79.bin
996732d9611859535e3906cf6fa19aa54aa22f41589c223585d7bc8429fc322e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D79 10512 bytes
font_02_sfnt_off00009195.bin
53c7b9a383a97256cdb487003439ced81c9805ba2ec9b86cf1439b4178bb1802
pdf-font-stream PDF embedded font (sfnt) at offset 0x9195 18732 bytes