Malicious PDF — malware analysis report

Static analysis result for SHA-256 357576527aabe627…

MALICIOUS

PDF

57.4 KB Created: 2020-08-30 12:41:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54db195314f023cbc8798e7c082da7a0 SHA-1: cd8f2efb8bbb15418ce1042013bf4bd3502bc23b SHA-256: 357576527aabe627cf2415a0b7f88acdaf05e87543cd73d65aafe08028c8e221
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources, a technique often used for SEO poisoning or to host malicious content. One critical heuristic identified a link to a known malicious redirector infrastructure at https://ttraff.cc/wix. The document body, though heavily obfuscated, contains the same URL and a reference to 'milieu therapy definition', suggesting a lure to disguise the malicious intent. The file's structure and the presence of numerous links indicate a campaign to drive traffic to malicious sites.

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=milieu+therapy+definition
    • https://static.usrfiles.com/ugd/79e5df_d422c85de55d44cea21e97f024b315e0.pdf
    • https://static.usrfiles.com/ugd/93c935_3528db94b4f04804884d2aa3f6ac55ce.pdf
    • https://static.usrfiles.com/ugd/b8c837_e91ff4138f344b0bbd5ffb5a6cf491fe.pdf
    • https://static.usrfiles.com/ugd/f80014_c87e55a3b9eb4f76b116251b57ecf6de.pdf
    • https://static.usrfiles.com/ugd/40512e_bfe6564804c94594a132ba4e93e9d9b6.pdf
    • https://static.usrfiles.com/ugd/b8c837_f30751eebfe84bc9b64713e41fe34c72.pdf
    • https://static.usrfiles.com/ugd/0a0016_5e81c1b6a9a44aff814a2dfc05de742d.pdf
    • https://static.usrfiles.com/ugd/55f640_16225c0e88d1430faee8bf171b2352be.pdf
    • https://static.usrfiles.com/ugd/0dd040_8555ebd5d2cd40758c759d214073abf0.pdf
    • https://static.usrfiles.com/ugd/b8c837_48aad82aea9f4dc9ae1c5ac7a2329b86.pdf
    • https://cdn.shopify.com/s/files/1/0430/3339/5353/files/bad_michael_jackson_mp3.pdf
    • https://cdn.shopify.com/s/files/1/0438/8772/2648/files/36014779873.pdf
    • https://cdn.shopify.com/s/files/1/0436/9966/7112/files/levizijifetapopazi.pdf
    • https://cdn.shopify.com/s/files/1/0435/3048/5912/files/ramolovosina.pdf
    • https://cdn.shopify.com/s/files/1/0432/7034/0772/files/17936286061.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_off0000a48f.bin
4bf9207eab8055b596df10a8be6d3c1bd9e0e7186345c9e661971e4d80a8a3d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA48F 5060 bytes
font_01_sfnt_off0000b5cc.bin
efeedc473bb552ce36f5621ed368b0715391511440ad209cf4b80b791be1d0c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB5CC 10144 bytes

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