Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d391bfb3ea8bb25…

MALICIOUS

PDF

44.0 KB Created: 2020-08-30 12:59:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86a373ecef1d75eeeece99ab5b09396b SHA-1: ee4ce74fc0b333bcae977299b8cfc99392efe65d SHA-256: 8d391bfb3ea8bb2587697b3dcd11a22b551117829cc1055b012bb8cd8dabbe75
120 Risk Score

Malware Insights

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

The PDF file contains a mass external link farm, with a critical heuristic firing indicating a malicious redirector link. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/wix?keyword=charas+2004+movie++480p', which is flagged as malicious. The presence of numerous links to static.usrfiles.com suggests a link farm designed to obscure the ultimate destination and potentially improve search engine ranking for malicious content.

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.cc/wix?keyword=charas+2004+movie++480p
    • https://static.usrfiles.com/ugd/b8c837_1cca151932c04f19ba94db3104cbf18e.pdf
    • https://static.usrfiles.com/ugd/b8c837_356230d3c3694ca8af539d8cba9a1ce1.pdf
    • https://static.usrfiles.com/ugd/4b7290_6650798aaecb453482aa2a7706ea0e73.pdf
    • https://static.usrfiles.com/ugd/2274a7_2382403ea75147b6b30d425a687c7b8c.pdf
    • https://static.usrfiles.com/ugd/b8c837_b8aca27c7d4542239c51cec8aad82f48.pdf
    • https://cdn.shopify.com/s/files/1/0436/7892/4953/files/.pdf
    • https://cdn.shopify.com/s/files/1/0428/9150/9919/files/adding_and_subtracting_decimals_worksheets_common_core.pdf
    • https://static.usrfiles.com/ugd/a18aa6_ab799fa1696c46ac8650e00314f8a6e4.pdf
    • https://static.usrfiles.com/ugd/ecec20_a94f21d926ef4498958dd59fcbe6e423.pdf
    • https://static.usrfiles.com/ugd/5438e3_6fc6480e24c740d8af8a8dfa70e5acc4.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/lipekajepotozoze.pdf
    • https://cdn.shopify.com/s/files/1/0430/9755/5093/files/dulalevomalazoz.pdf
    • https://cdn.shopify.com/s/files/1/0440/7682/6789/files/gradient_boosting_algorithm.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_off000051af.bin
5788c64cdae656addac9b943eb62d91941b5bacdcb114240b835df9c42263f39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51AF 5548 bytes
font_01_sfnt_off00006475.bin
60b5df8ef9ea2c73ae54fe48fde59eafacf9f543ab96f79de18a447e40d9b69e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6475 10452 bytes
font_02_sfnt_off00008867.bin
7896bcf2fb0829ee51b9fb16df7d82b0061e999177596d9ae6cd632060576d22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8867 17732 bytes

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