Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee0b7bc9f6905b28…

MALICIOUS

PDF

45.7 KB Created: 2020-08-31 09:19:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c1129a2f4c36677de7942ad465daf86 SHA-1: dc7cca10b58276d3962534306b8aa96f8f42519d SHA-256: ee0b7bc9f6905b280d90a8cfa96e67499410d41460c458848e089d63460ba838
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/wix?keyword=ark+survival+beginners+guide'. The document body, though heavily obfuscated, contains references to 'Ark survival beginners guide' and the same redirector URL, suggesting a social engineering lure. The file also exhibits characteristics of a link farm, with numerous external PDF links, many hosted on static.usrfiles.com, which are likely part of the same distribution infrastructure.

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.cc/wix?keyword=ark+survival+beginners+guide
    • https://static.usrfiles.com/ugd/3826db_bbf71664ba184355b7c830766ad4a152.pdf
    • https://static.usrfiles.com/ugd/f09a9d_3ea361daadaf4ef48396d7c396e50cb3.pdf
    • https://static.usrfiles.com/ugd/f84671_97fe2cddd1644287aa87348eb8f0879c.pdf
    • https://static.usrfiles.com/ugd/b8c837_dfe136bcdc9e448dbf4c3a112f7ebd87.pdf
    • https://static.usrfiles.com/ugd/b58d21_464e342a9e0b4727be6cb3b056a22f9b.pdf
    • https://static.usrfiles.com/ugd/3aca14_94b3f1ae06434973a1df7ac0ab1ceb13.pdf
    • https://cdn.shopify.com/s/files/1/0429/3633/6540/files/85085137965.pdf
    • https://cdn.shopify.com/s/files/1/0431/8763/4338/files/gabejufubeniduxubolu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3429/5966/files/47413102732.pdf
    • https://cdn.shopify.com/s/files/1/0427/6230/5702/files/pibefavotenuvawisor.pdf
    • https://static.usrfiles.com/ugd/b8c837_05e8dd3f692e42dd9d7b98aabf6b5b1c.pdf
    • https://static.usrfiles.com/ugd/d94ae5_d65d00f871254d169472cb122f9ea13e.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_off000075c3.bin
3f18c36560e9a8bd2f18819de3254f0ab10acdd40ccb05ce16fa4ff04f423c5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75C3 5244 bytes
font_01_sfnt_off000087a5.bin
42c4577e0caabc19412329392af059cc6226cab19b6395f74226774b0c7e0cb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87A5 10084 bytes

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