Malicious PDF — malware analysis report

Static analysis result for SHA-256 3df487a641a9cd37…

MALICIOUS

PDF

35.1 KB Created: 2020-08-30 18:50:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82867d8ee3c398304d6a82e9fca8da3b SHA-1: 6d553a2db0b8346316ef42fc7b3d7ff8b685a066 SHA-256: 3df487a641a9cd376ff5d3205e1c54f0c4370fa5916650d1d78cb16f5f074625
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with the primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to song downloads, suggesting a lure to attract users to click the malicious link. The embedded links are designed to appear as legitimate search results, leading users to potentially 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.ru/wix?keyword=thirupachi+songs+download+masstamilan
    • https://static.usrfiles.com/ugd/b8c837_3dc3a6cc412c4f74a54d1d6571b24b38.pdf
    • https://static.usrfiles.com/ugd/05900a_c0a757a67aa04516918f2fd3922677a3.pdf
    • https://static.usrfiles.com/ugd/b8c837_59eba415dd24402eadfa50bc7d0585f8.pdf
    • https://static.usrfiles.com/ugd/b8c837_31eafa4a4833453b89353e055376cbda.pdf
    • https://static.usrfiles.com/ugd/e2b09b_86e3330692aa4a4db911473846dd7e6b.pdf
    • https://static.usrfiles.com/ugd/3cb679_1640718521274ec985d009d4b87e96b2.pdf
    • https://cdn.shopify.com/s/files/1/0427/8134/3903/files/86653958352.pdf
    • https://cdn.shopify.com/s/files/1/0435/1619/9064/files/46817055953.pdf
    • https://cdn.shopify.com/s/files/1/0432/1814/1347/files/lisogiruzolisalijagib.pdf
    • https://cdn.shopify.com/s/files/1/0438/0629/4176/files/dadulapigi.pdf
    • https://cdn.shopify.com/s/files/1/0434/4990/9415/files/culinary_tourism.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_off00004a96.bin
b0d1c99962d2e2a005e4eefba4b2dafd23dc178c456aaac5a447944115463b3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A96 5528 bytes
font_01_sfnt_off00005d3d.bin
3b5ba9d263613258e162ef9fb87a2d2adcd5f8e5244fdbe4a00ebf053fc57732		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D3D 10152 bytes

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