Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6a82474d7b7d3e8…

MALICIOUS

PDF

47.1 KB Created: 2020-08-16 02:33:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d4e82883621a0d9ab4cccce2200af50 SHA-1: 3827fb5811d62ee62fac2eee51ec0290c5fa356f SHA-256: a6a82474d7b7d3e895323d15cdc9b5737b376df2e255174cb01a313e22040be2
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/wb?keyword=causes%20of%20chronic%20kidney%20disease%20pdf'. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs, including 'http://files.peckpagoriawedding.com/uploads/1/3/2/7/132710704/kilosokivar.pdf'. The document body, though heavily obfuscated, contains references to these URLs, suggesting an attempt to drive traffic to malicious infrastructure under the guise of providing information.

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.ru/wb?keyword=causes%20of%20chronic%20kidney%20disease%20pdf
    • http://files.peckpagoriawedding.com/uploads/1/3/2/7/132710704/kilosokivar.pdf
    • https://cdn.shopify.com/s/files/1/0432/2328/5928/files/forrest_gump_penguin_reader_level_3.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20424522606.pdf
    • https://cdn.shopify.com/s/files/1/0437/7785/1550/files/bell_tiles_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0431/3081/4626/files/holt_california_physical_science_textbook_8th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0433/5170/3706/files/basic_engineering_drawing_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/1979/6643/files/hot_wheels_wallpaper.pdf
    • https://cdn.shopify.com/s/files/1/0427/4801/8855/files/importance_of_job.pdf
    • https://cdn.shopify.com/s/files/1/0432/0762/2824/files/jimuduxuneza.pdf
    • https://cdn.shopify.com/s/files/1/0433/9276/2017/files/nelafitadamowifogene.pdf
    • https://cdn.shopify.com/s/files/1/0438/5724/8421/files/19223983135.pdf
    • https://cdn.shopify.com/s/files/1/0431/0591/0933/files/68093396350.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_off00006b8c.bin
b0d358a9c2da9dca04543732b04991462abf528480f85ffc8f56114c2f68d06e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B8C 5204 bytes
font_01_sfnt_off00007d37.bin
5a99b6189ed71f42ab12a25f2270a3d51f8dd07be1b23e04a4340265500492ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D37 10796 bytes
font_02_sfnt_off0000a194.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA194 4324 bytes

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