Malicious PDF — malware analysis report

Static analysis result for SHA-256 97715fd74603e294…

MALICIOUS

PDF

37.0 KB Created: 2020-08-30 07:24:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84351885ee35cf5deae3428fd7c9e5c7 SHA-1: 42670d21fcb107cb175d5bab2a2b04441ec0a597 SHA-256: 97715fd74603e294de0e85bcc4c21d0e0f1dda1cbde2a016dba1931e17132495
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of a significant number of external links. One critical heuristic firing indicates a link to a known malicious redirector at 'ttraff.com'. Another critical heuristic firing flags the document as a link farm, containing numerous external PDF links, with 'static.usrfiles.com' being a dominant host. The embedded URLs suggest an attempt to lure users to external sites, likely for malicious purposes.

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.com/wix?keyword=words+to+greased+lightning%2529
    • https://static.usrfiles.com/ugd/362633_461ec8c9716344dfb84ee9e39a0024e5.pdf
    • https://static.usrfiles.com/ugd/599026_aa947972605848138d5c25092374404d.pdf
    • https://static.usrfiles.com/ugd/1c90dc_5d636a3eb4d34b8aa4672e38f35d4c45.pdf
    • https://static.usrfiles.com/ugd/c5d40f_a72a823976784545a1187dc75242ca9f.pdf
    • https://static.usrfiles.com/ugd/a18aa6_68ded627ed774c178b120814d95184f7.pdf
    • https://static.usrfiles.com/ugd/b8c837_f7b557e2baab4bf5881c387455893c6a.pdf
    • https://static.usrfiles.com/ugd/b8c837_903ed052b9164704967317d2aaf1eb30.pdf
    • https://static.usrfiles.com/ugd/6240f8_6fd51cafadee4ff3bbb594f2400635ea.pdf
    • https://cdn.shopify.com/s/files/1/0430/2602/2554/files/kadiwegupexesaxikusagi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6885/8272/files/ditobimalukimibekojikasu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8506/1541/files/tosubiluzu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7812/3680/files/55921492026.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_off00004d2e.bin
f6f393748ae20776632379f9c17a4f824602cc2cfc39ce6e355f2390c0931ecd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D2E 5176 bytes
font_01_sfnt_off00005ed2.bin
6ca63d1f26bc22f1e1a8f70f067388f4ff658a9ccc79795abeb4591dab23f48f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED2 12912 bytes

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