Malicious PDF — malware analysis report

Static analysis result for SHA-256 31507e667fc2e2cd…

MALICIOUS

PDF

33.8 KB Created: 2020-08-30 21:25:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54921e557b778fd444532ff7d6915791 SHA-1: 9115073017394c01e93eb980a9b1641c6b0fe998 SHA-256: 31507e667fc2e2cdeaac60de7ec3a8ace736bb783c1dde68f2d4134038c2c41b
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/wix?keyword=woodworking+revista+woodsmith', likely leads to a malicious site. The file also contains a PDF link farm heuristic, pointing to multiple external PDFs, one of which is 'https://cdn.shopify.com/s/files/1/0428/3141/3414/files/currensy_stoned_immaculate_download.pdf'. The overall purpose appears to be social engineering through a lure related to woodworking content to redirect users to a malicious destination.

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=woodworking+revista+woodsmith
    • https://cdn.shopify.com/s/files/1/0428/3141/3414/files/currensy_stoned_immaculate_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/9279/4774/files/72194212940.pdf
    • https://cdn.shopify.com/s/files/1/0431/2891/4087/files/82478959558.pdf
    • https://cdn.shopify.com/s/files/1/0436/9124/5733/files/dollar_tree_job_application_online.pdf
    • https://static.usrfiles.com/ugd/9b7d8a_a202282588d942d595aa2cda2bc5e492.pdf
    • https://static.usrfiles.com/ugd/b8c837_60555049390642529381efb17e044f90.pdf
    • https://static.usrfiles.com/ugd/191a6d_9d3c1378025c4e3b9cac7eb6fe06eb34.pdf
    • https://static.usrfiles.com/ugd/c068f8_594f052043754109b90f88ed2cdef270.pdf
    • https://static.usrfiles.com/ugd/6290de_42b6339dfa264c6ab99cbc667f06a0bf.pdf
    • https://static.usrfiles.com/ugd/b8c837_07ea9e21372841c4a0eb190b456ddc9a.pdf
    • https://static.usrfiles.com/ugd/83b1b3_b145a590884d44c886d0f7835f2150c0.pdf
    • https://static.usrfiles.com/ugd/b8c837_e97d1b49d85246f88f14ebaee3a5159f.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_off0000461f.bin
e030ae449510a3db1468bfab72e587542068c73ddd2f3f1d1bf658046c524e8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x461F 5436 bytes
font_01_sfnt_off00005894.bin
8e2a85ea21365b63e1e23b4ed8696b52968be58ed2078b48c6163159e9e0712a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5894 9972 bytes

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