Malicious PDF — malware analysis report

Static analysis result for SHA-256 e088948d34d87e89…

MALICIOUS

PDF

41.3 KB Created: 2020-08-31 09:01:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a15a35e2fb08d19c4bbca2edf8e4dd18 SHA-1: 5b9b5bacead69e134d458ac24887c18d09aeead7 SHA-256: e088948d34d87e890c381d9312f9a9310c4558c10e91e1bb877b3015cc71b5ea
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, a technique often used to create link farms for SEO manipulation or to distribute malicious content. One of the primary links points to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body appears to be corrupted or obfuscated, but the presence of the malicious redirector URL is a strong indicator of malicious intent.

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=d%25C3%25A9jalos+ir+con+amor+la+aceptaci%25C3%25B3n+del+duelo
    • https://static.usrfiles.com/ugd/b8c837_c29ae1bceaaa479c8e4ea670a18e14fb.pdf
    • https://static.usrfiles.com/ugd/b8c837_afbed24747424c868d89aeb25c9ee842.pdf
    • https://static.usrfiles.com/ugd/d63aaf_05a690905cce4ef296505f2cdcd1bd32.pdf
    • https://static.usrfiles.com/ugd/804ff6_3795c1bb62c9446eab83bb64ded8d57b.pdf
    • https://static.usrfiles.com/ugd/b8c837_4877bc4b4c9941c49c24fecd89eff65e.pdf
    • https://cdn.shopify.com/s/files/1/0427/8029/5334/files/sitesuteretijuxipa.pdf
    • https://cdn.shopify.com/s/files/1/0430/0318/3258/files/pizuzoxogopumoxupukuv.pdf
    • https://cdn.shopify.com/s/files/1/0436/3078/8758/files/siwoputupelisugarafegaz.pdf
    • https://static.usrfiles.com/ugd/b8c837_67e9014330664e5091f38963a7518c61.pdf
    • https://static.usrfiles.com/ugd/71fd01_b5c59587230c4f50a533c5a0ff08d6da.pdf
    • https://static.usrfiles.com/ugd/b8c837_e17292eb6db1468bb6f5aa040c921649.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_off00005305.bin
301db0382462d780244fc65136388f9c01ccf06d5ceeb757be28eb3941b8cc0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5305 5456 bytes
font_01_sfnt_off000064eb.bin
6a8402e29c0201cfc2db1ef24479e4327fd820d83ba7ced2636cd3161005e045		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64EB 10752 bytes
font_02_sfnt_off0000881d.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x881D 4324 bytes

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