Malicious PDF — malware analysis report

Static analysis result for SHA-256 24b3a15f5fdf6249…

MALICIOUS

PDF

41.9 KB Created: 2020-08-20 20:38:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b2b4174c68924b78106419749f57050 SHA-1: 7345516b2d2b7845b0b5ef27ce71f4b7cd35b160 SHA-256: 24b3a15f5fdf62498e674fd9f7ca215eb5eb315653a13f13a82bae7e56ca3458
128 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=common+accounts+payable+reports'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, including several to shopify.com domains. The document body text and a heuristic indicate a lure related to invoices or payments. No scripts were extracted from this sample.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/pify?keyword=common+accounts+payable+reports
    • http://files.nashvilleyouthathletics.org/uploads/1/3/0/9/130969663/9166727.pdf
    • http://fumota.bagitrite.com/uploads/1/3/1/3/131380213/lutugatifilugana.pdf
    • https://cdn.shopify.com/s/files/1/0437/6258/1658/files/investing_in_asset_backed_securities_fabozzi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87463685859.pdf
    • https://cdn.shopify.com/s/files/1/0431/4152/9754/files/janela_magica_cecilia_meireles.pdf
    • https://cdn.shopify.com/s/files/1/0428/4832/1702/files/am._apowersoft_pc.pdf
    • https://cdn.shopify.com/s/files/1/0432/7027/5237/files/mejazilexumeresatenibu.pdf
    • https://cdn.shopify.com/s/files/1/0451/0292/3939/files/analysis_and_design_of_parallel_algorithms_lakshmivarahan.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wakudegebemufajetexu.pdf
    • https://cdn.shopify.com/s/files/1/0461/4668/3043/files/kindle_fire_7_9th_generation_user_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/8863/2213/files/bambara_nut_flour.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0490/files/5090774173.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_off00005ab5.bin
f2ef101ee2021fca98a21fa4ecf9a794712ef10f8c82e47532beff530c183567		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AB5 5228 bytes
font_01_sfnt_off00006c60.bin
6fb4bdd4d72799f9c9fbdf20c20ac8e06e044790ad7b829d6bbd743b82fc7e58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C60 14472 bytes

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