Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6dbc563afcdf277…

MALICIOUS

PDF

49.0 KB Created: 2020-09-20 10:40:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 344bb043728de68b16e0be1de09189b8 SHA-1: 67fcb2dd21d9620f88dd3cbc4497e49aabe7d8a4 SHA-256: f6dbc563afcdf2779acf124f32f6c0d049b9d8ba309887411a08d6c58e72a250
152 Risk Score

Malware Insights

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

The PDF contains a direct link to a known malicious redirector, ttraff.me, which is disguised as a search result for 'swbf2 mods ps4'. The document body, though heavily obfuscated, contains the same URL. The presence of a large number of external PDF links, many pointing to similar domains, suggests a link farm or SEO poisoning attempt to drive traffic to malicious sites.

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.me/wix?keyword=swbf2+mods+ps4
    • http://zikuxu.saraspondayoga.com/uploads/1/3/0/7/130740510/8ed993a6b38953.pdf
    • http://files.rolyart.co.uk/uploads/1/3/2/8/132816042/sunagukamuviviramego.pdf
    • http://files.setsunlimited.com/uploads/1/3/1/3/131378780/jelubaxuke.pdf
    • https://52723aca-1f9f-4ce4-a509-bef15311c
    • https://cdn.shopify.com/s/files/1/0431/7950/7875/files/379997950.pdf
    • https://082f7f88-e667-4dfb-860a-2d64f2f94963.filesusr.com/ugd/35e1ce_d6eafb04c63448e9b0ab382bd002f0bc.pdf?index=true
    • https://14386dbb-0433-46ca-9f7f-d40923647089.filesusr.com/ugd/a4c1fa_62a6b8b1a5ee4c95a9609b3385e47777.pdf?index=true
    • https://52723aca-1f9f-4ce4-a509-bef15311c9c0.filesusr.com/ugd/dc8a8e_231ee2051782473cae3d82fcbaad5b44.pdf?index=true
    • https://007253ab-0c22-4ced-b3d0-563ba99d4455.filesusr.com/ugd/baef12_811dd8e6b9604dccb3101941acf9c077.pdf?index=true
    • https://1e68389c-b77b-4a1b-9108-d462ff9f0073.filesusr.com/ugd/74c34a_9d3389a34cf4420290c3a23b57943ab7.pdf?index=true
    • 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_off000081b8.bin
4562884da77748b046122b53286fa161be665dcea7d062ce3c21f2c3e527921f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81B8 5404 bytes
font_01_sfnt_off00009426.bin
9e0855899b3b8beb9b358972166a0ae81484f77369e5282a7010a7b10c1c5bfc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9426 10500 bytes

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