Malicious PDF — malware analysis report

Static analysis result for SHA-256 49a6c4361e9646f3…

MALICIOUS

PDF

91.4 KB Created: 2020-09-01 02:11:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f181e4fe85a7de5cf3b6877256f0544 SHA-1: 58f35127babbfff7c28e60a3a82621e53eea9cca SHA-256: 49a6c4361e9646f39858372c51335bad85459b322d66c64e30ec050de5c99081
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The link leads to 'ttraff.cc', a known malicious domain. The document also contains a large number of external PDF links, suggesting a link farm for SEO poisoning or to obscure the malicious destination. The presence of a 'download button' lure further supports a malicious intent to redirect the user.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=preschool+teacher+introduction+letter+to+parents+template
    • https://static.usrfiles.com/ugd/b52961_cdd7711460d44e98b709bbf22dfea58d.pdf
    • https://static.usrfiles.com/ugd/7e0eb0_aef1d6356a8e4e1cb78c1e9aaa1c063c.pdf
    • https://static.usrfiles.com/ugd/b8c837_38cdd23d8d904530a83b8b277b5e09ae.pdf
    • https://static.usrfiles.com/ugd/ab0441_1dda4e9599344a338b2e61db88b98357.pdf
    • https://static.usrfiles.com/ugd/83b1b3_b88c6147eb2b448d86cb1ee7829cf6d2.pdf
    • https://static.usrfiles.com/ugd/cbe7f7_86582430d09b46f5ac737fb7596d51d0.pdf
    • https://static.usrfiles.com/ugd/b8c837_a86d91661e1c4b0799e907e1ff31fb36.pdf
    • https://static.usrfiles.com/ugd/b8c837_41b445d729604eb491da607c374981f2.pdf
    • https://static.usrfiles.com/ugd/edb4a7_a34420bb19104c979874ce8115970645.pdf
    • https://static.usrfiles.com/ugd/8127dd_07c49696e17d4270b97d3bd4189eca73.pdf
    • https://cdn.shopify.com/s/files/1/0431/6076/4576/files/79625907357.pdf
    • https://cdn.shopify.com/s/files/1/0433/3325/5323/files/93930286825.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011a5c.bin
66d433e421554ae54cba4fcad17576cdf82b634aed4b22e2c6d4d01808e13e32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A5C 5196 bytes
font_01_sfnt_off00012bc9.bin
500fae9b6b8aef03535e9a3976322e14c18f343ec3950e8e2b0fb1c7c95adddb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12BC9 11432 bytes
font_02_sfnt_off00015213.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15213 4324 bytes

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