Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f9bff376e595ecc…

MALICIOUS

PDF

33.6 KB Created: 2020-08-31 02:42:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0add2a9a8ab8fa8f7f670a598cf2331 SHA-1: 6ac1dff20398479c461f07596fcabcd35ce6e315 SHA-256: 8f9bff376e595ecc9d2cbc06efbc932fc3f951a883f8355dad13fbd3245adb0c
150 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, disguised as installation instructions for a toilet seat. The document body, though heavily obfuscated, contains keywords related to the lure and the malicious URL. The PDF also exhibits characteristics of a link farm, likely intended to distribute malicious content or engage in SEO poisoning.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=duravit+toilet+seat+installation
    • https://static.usrfiles.com/ugd/5ed537_cd7bb81cbd804c859ada06f0ec0e2739.pdf
    • https://static.usrfiles.com/ugd/d90490_acfaf06ac5664f79b7de2df19984c3a4.pdf
    • https://static.usrfiles.com/ugd/2c8d66_ae9fe445f32a46ae8d86730d8be6ba44.pdf
    • https://static.usrfiles.com/ugd/d01287_290a2c2d57eb4ba8bd59126635b1d2f0.pdf
    • https://cdn.shopify.com/s/files/1/0438/6645/6224/files/zupom.pdf
    • https://cdn.shopify.com/s/files/1/0431/6941/5327/files/85459715512.pdf
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/30961093930.pdf
    • https://cdn.shopify.com/s/files/1/0433/4950/8250/files/cinema_4d_crack.pdf
    • https://cdn.shopify.com/s/files/1/0429/6074/8695/files/95440392489.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/zilotapemarozup.pdf
    • https://cdn.shopify.com/s/files/1/0435/3415/5928/files/analytic_geometry_grade_10_practice_test.pdf
    • https://cdn.shopify.com/s/files/1/0429/7188/9815/files/rubogigekutofovuxiwa.pdf
    • https://cdn.shopify.com/s/files/1/0434/5144/9496/files/fevoturavunuv.pdf
    • https://static.usrfiles.com/ugd/55f640_f52d8993bb974da3989824c349ae1a0d.pdf
    • https://static.usrfiles.com/ugd/10e3af_c44b9136b15f4115a1fa7f4f09e4bf92.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_off00004949.bin
d8c3277092f1266e489fc4074c3ac9b5c71c8693259f571cd3a29d84dad31c02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4949 4736 bytes
font_01_sfnt_off00005977.bin
0ac7194b0830540b61ad4746d697acb8ba03d76f19056f4897599390571b9a5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5977 9412 bytes

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