Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc8a58e0b73cc93f…

MALICIOUS

PDF

41.7 KB Created: 2020-08-30 13:10:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 432ce652f3b9c2d957fe02cba398f5d5 SHA-1: a1bd24f454d085301e1497ec78ecf921fcf9ffe4 SHA-256: dc8a58e0b73cc93f53baa95fcfe8fedbb4c7d9aff1243abc1cddb079dc07ac2f
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, pointing to 'https://ttraff.ru/wix?keyword=vargel+tezgah%25C4%25B1+nas%25C4%25B1l+%25C3%25A7al%25C4%25B1%25C5%259F%25C4%25B1r'. Additionally, the PDF_SEO_LINK_FARM heuristic indicates the presence of numerous external links, with 'https://cdn.shopify.com/s/files/1/0431/8360/3876/files/87924345450.pdf' being the first identified. These links suggest an attempt to manipulate search engine results or redirect users to potentially harmful 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.ru/wix?keyword=vargel+tezgah%25C4%25B1+nas%25C4%25B1l+%25C3%25A7al%25C4%25B1%25C5%259F%25C4%25B1r
    • https://cdn.shopify.com/s/files/1/0431/8360/3876/files/87924345450.pdf
    • https://cdn.shopify.com/s/files/1/0457/0470/8252/files/frmacos_antiulcerosos.pdf
    • https://cdn.shopify.com/s/files/1/0429/5147/5366/files/baal_veer_ki_picture.pdf
    • https://cdn.shopify.com/s/files/1/0448/0273/6279/files/billy_elliot_electricity_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0430/6773/6225/files/astm_a325_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/7948/9950/files/tutuwos.pdf
    • https://cdn.shopify.com/s/files/1/0431/0463/2992/files/bunipibegaguvepufejazi.pdf
    • https://cdn.shopify.com/s/files/1/0428/3544/3871/files/85046782671.pdf
    • https://cdn.shopify.com/s/files/1/0434/3998/0710/files/internet_manager_module_chrome_web_store.pdf
    • https://cdn.shopify.com/s/files/1/0428/9111/6700/files/27340380751.pdf
    • https://cdn.shopify.com/s/files/1/0428/5893/8531/files/how_to_annotates_on_notability.pdf
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/alien_skin_photoshop_plugin_free.pdf
    • https://static.usrfiles.com/ugd/b8c837_694db9700031449888a3771616668c3d.pdf
    • https://static.usrfiles.com/ugd/60933b_6a19ddcac4304c96b68d429cfe0663b0.pdf
    • https://static.usrfiles.com/ugd/c8a981_a696c9923e37426bbaefa169cce5fcf8.pdf
    • https://static.usrfiles.com/ugd/b8c837_da0534fc26834392a6891e7b16b012dc.pdf
    • https://static.usrfiles.com/ugd/b9801a_98495067c7074aee8acbe570805a3a2f.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/
    • https://cdn.shopify.com/s/files/1/0437/7948/9950/files/tutuwos

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062ce.bin
d14b11aa064417d4c1f526fb1762ce7b3cf4f15a1e5800fde16d92a0230f7190
pdf-font-stream PDF embedded font (sfnt) at offset 0x62CE 5424 bytes
font_01_sfnt_off00007498.bin
b537c09203370ca2d89f65e7362d0e9e5cbaeb96eb3f65d9c13c7a401bab4ba0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7498 11184 bytes