Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7b2fa6493a09d13…

MALICIOUS

PDF

53.4 KB Created: 2020-08-29 17:44:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff5b024487e597830141a3c7ae6d2dc0 SHA-1: ae31a3d8def2aaebd4c787c5d86da35aeeb9ad8c SHA-256: a7b2fa6493a09d137c4a609ba4300600d00ce0d70b998dc8f9bb139bcb2dd881
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/wix?keyword=minecraft+resilience+1.7.2+indir'. This link is presented within the document body, disguised as a download for Minecraft content. The file also exhibits characteristics of a PDF SEO link farm, with numerous links to external PDFs, including 'https://static.usrfiles.com/ugd/b8c837_acc9de464a35427b99cb71e95afca048.pdf'. The primary intent appears to be directing users to malicious 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=minecraft+resilience+1.7.2+indir
    • https://static.usrfiles.com/ugd/b8c837_acc9de464a35427b99cb71e95afca048.pdf
    • https://static.usrfiles.com/ugd/f4de5e_9116616f62964dd7a6bc8458121b35c0.pdf
    • https://static.usrfiles.com/ugd/67e251_aaca9911d0a44d67afe765b3b947423a.pdf
    • https://static.usrfiles.com/ugd/b8c837_48d56d99f5db44099dd19650b14b9f03.pdf
    • https://cdn.shopify.com/s/files/1/0429/9459/8047/files/nirumalodixek.pdf
    • https://static.usrfiles.com/ugd/b8c837_b53e9525bd1749be8c2034ce0e38c3fb.pdf
    • https://static.usrfiles.com/ugd/b8c837_0430d59fc6b84d73877ca041e394734c.pdf
    • https://static.usrfiles.com/ugd/8de238_1d3484fda670440eb0fc019f58ab8c1e.pdf
    • https://static.usrfiles.com/ugd/b8c837_4b9746658cfc488088f5c7229684231e.pdf
    • https://static.usrfiles.com/ugd/b8c837_1fdf14fbccdf47169eb3b1d1f1c95a63.pdf
    • https://static.usrfiles.com/ugd/b8c837_1d8c67967e934c16be67fbfbc3b00398.pdf
    • https://static.usrfiles.com/ugd/a91264_3d66e6a2b1124606936e2579eccb4983.pdf
    • https://static.usrfiles.com/ugd/b8c837_60dc015ac09b45b9bad1647d7fa67711.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006148.bin
2ce5a7286efefc5aae27ce1c31b3347e159d00bd30cf97f509a0b7f7d49caffb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6148 6440 bytes
font_01_sfnt_off0000713d.bin
6bc4f58bd500c09662316917cca8701def24cecfe38aaa002951dc984417f9e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x713D 5316 bytes
font_02_sfnt_off00008363.bin
51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8363 1800 bytes
font_03_sfnt_off00008bf1.bin
6577a695c0d679359543c8520beef10e6bb5dc920c15a81e5646c42709966bd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BF1 10540 bytes
font_04_sfnt_off0000b033.bin
71687b8eae966b168c2932548137dc79be99e20a86dea390714c4aa8005d9f79		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB033 16260 bytes

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