Malicious PDF — malware analysis report

Static analysis result for SHA-256 af05ac97c472d58b…

MALICIOUS

PDF

45.3 KB Created: 2020-08-30 13:56:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f94a6d43d77d11c44984720cc7b129c SHA-1: 7df45f5ca763db6102556b2219140db60cb4cc18 SHA-256: af05ac97c472d58b08e97b34a826e105ee03af3a33d0cf24f10fec9844b38658
128 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=peanut+allergy+baseball+stadiums'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs hosted on 'static.usrfiles.com'. The 'SE_INVOICE_LURE' heuristic suggests the document's content is designed to trick the user into clicking the malicious link, likely as part of a phishing or scam campaign.

Heuristics 4

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.me/wix?keyword=peanut+allergy+baseball+stadiums
    • https://static.usrfiles.com/ugd/c3548c_419f4bfd0b484354adfd35c7250cd284.pdf
    • https://static.usrfiles.com/ugd/e4ff69_2914b94c47c3479a8a326cce3864abf4.pdf
    • https://static.usrfiles.com/ugd/eb6612_15051ec6c81b4aa1bb0b9d7c6ae3296a.pdf
    • https://static.usrfiles.com/ugd/b8c837_6a38e8ebcf63434ba231abaef4201637.pdf
    • https://static.usrfiles.com/ugd/87a178_9b1308f351fa401faa421c3273d0f593.pdf
    • https://static.usrfiles.com/ugd/b8c837_0887dcaaabfa42f485b4679c9130eee4.pdf
    • https://static.usrfiles.com/ugd/067ecb_8b46b8fb2b6048849d52ccad4efcd125.pdf
    • https://static.usrfiles.com/ugd/b28561_7397bcf0175c4821abf2b89858d9712f.pdf
    • https://cdn.shopify.com/s/files/1/0431/4267/6648/files/18156852108.pdf
    • https://cdn.shopify.com/s/files/1/0435/4693/5460/files/88387346211.pdf
    • https://static.usrfiles.com/ugd/b8c837_d43b6ec7328043178df670c7166d41a8.pdf
    • https://static.usrfiles.com/ugd/97493d_1db3f775b33f4f04919760259af6afa5.pdf
    • https://static.usrfiles.com/ugd/b8c837_9eace22d32914984a2f7a99007a56742.pdf
    • https://static.usrfiles.com/ugd/b56239_b1972d1b1b2b4e58a92d43f00178687d.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_off00007205.bin
1d6f89f8f4c29d6c9df1e9a5afedd09d17838946ef1c887b053fc1e47ff77139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7205 5388 bytes
font_01_sfnt_off0000843e.bin
16cc0b551820f772a5f4cf7b0a646fa65db5db1de69af3b9cae75cf9fa49e762		 pdf-font-stream PDF embedded font (sfnt) at offset 0x843E 10588 bytes

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