Malicious PDF — malware analysis report

Static analysis result for SHA-256 d19c9db65df1b436…

MALICIOUS

PDF

38.0 KB Created: 2020-08-30 19:41:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6bf5815bc0915f4931e3624a1dfe379d SHA-1: 9f00eea837e7bfa052e722ba5d24c765cabf87e7 SHA-256: d19c9db65df1b43689c5e2ad66b60ec820f1afb1802d643846174ae6750ce7e2
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=skrillex+bangarang+free+mp3+download'. This URL is presented within the document body as a lure for free music downloads. The file also exhibits characteristics of a link farm, with numerous embedded links, many of which point to benign content but serve to obscure the malicious redirector. The primary malicious intent appears to be directing users to the ttraff.ru domain.

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=skrillex+bangarang+free+mp3+download
    • https://static.usrfiles.com/ugd/b8c837_e035f19bee364caeadc848be57b77a97.pdf
    • https://static.usrfiles.com/ugd/d775a9_ad42da7477d249ef978c265a63ecce3e.pdf
    • https://static.usrfiles.com/ugd/b8c837_a107a1d0827641bd97289a95c729bf0a.pdf
    • https://static.usrfiles.com/ugd/c75f60_e47e14c93d6b43e69825e13fa0e3c077.pdf
    • https://static.usrfiles.com/ugd/b91566_e6a564104c0045efbd85b14ecae4a2e4.pdf
    • https://cdn.shopify.com/s/files/1/0438/0337/7824/files/kukuranuxo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0846/6845/files/vimikusis.pdf
    • https://cdn.shopify.com/s/files/1/0429/3296/1443/files/41769162109.pdf
    • https://cdn.shopify.com/s/files/1/0432/1945/2072/files/donajojubikilaxogavef.pdf
    • https://cdn.shopify.com/s/files/1/0429/6572/9429/files/84496898202.pdf
    • https://static.usrfiles.com/ugd/f3ecbe_97bd36b5fe9e46f4afdbe539a368d7b0.pdf
    • https://static.usrfiles.com/ugd/32acb1_03fc63b92e984866848d1b611e5e7f75.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/bullworker_x5_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0437/8719/0430/files/lugizuvisapizudixe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/84860081798.pdf
    • https://cdn.shopify.com/s/files/1/0434/0921/1557/files/91060691094.pdf
    • https://cdn.shopify.com/s/files/1/0428/9203/4211/files/pexex.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_off000051c8.bin
5309c785419f22c3769b03f7ffeff4a9ccef5253fdaf80a9cd086ea2bac4de77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51C8 5812 bytes
font_01_sfnt_off0000658e.bin
93687ba46c25191dd406f4cbaa991f71dbd52b7315c7274a452f95389564946b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x658E 10900 bytes

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