Malicious PDF — malware analysis report

Static analysis result for SHA-256 b32f8cb5ad09ede2…

MALICIOUS

PDF

37.8 KB Created: 2020-09-16 13:56:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0195ced2c34e89742a83fd73e4bd05c8 SHA-1: 449d5afc49440db1237452f4f5a4888866c4123d SHA-256: b32f8cb5ad09ede221bf0c7ef8ed50e92021b68e60127c724ca19e3cc7ed4d67
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to 'https://ttraff.link/wix?keyword=chistes+no+es+lo+mismo+ordinarios'. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded links pointing to external PDF files, suggesting a coordinated effort to distribute malicious content. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains the same joke-related lure and the malicious URL, reinforcing the social engineering aspect.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.link/wix?keyword=chistes+no+es+lo+mismo+ordinarios
    • http://files.drawalkirisrobles.com/uploads/1/3/0/7/130775373/7052645.pdf
    • http://zodafa.archirayled.com/uploads/1/3/2/6/132695550/sewizajalodiv.pdf
    • http://files.wwwlc21.com/uploads/1/3/0/7/130776368/6ffef5ed5900402.pdf
    • http://xekid.milestonememoriesandevents.com/uploads/1/3/0/8/130814297/rinamupamarim_rafezisegoxev.pdf
    • https://6dc21e1d-8582-41ee-a6f9-c71b0899613c.filesusr.com/ugd/2994dd_1b875335da634709a43d17a81becfb4b.pdf?index=true
    • https://61c1fe8e-984a-4a87-b6d2-d28da0e012d1.filesusr.com/ugd/33ab24_a6b09c148c2a4f46bfb89e784b9e99ea.pdf?index=true
    • https://67fbdadd-ee3e-4001-8f74-41f8f58ae3c4.filesusr.com/ugd/76aeb6_dcd6aa3ec6404cf7841238ef93e5b9b6.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0434/6734/1974/files/40987113481.pdf
    • https://cdn.shopify.com/s/files/1/0430/8592/2466/files/3356471341.pdf
    • https://cdn.shopify.com/s/files/1/0463/1029/3669/files/tabojozepamavepixajil.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005514.bin
bc6b51ce7aa406fd81c82c62d9e75ae2af3baaf580f9f617cc9491b5bec19738		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5514 4972 bytes
font_01_sfnt_off000065c1.bin
77284bffd2f020ceae7f724bc529d5faddb0e87ecc5333ce3f68975737502fcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65C1 10848 bytes

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