Malicious PDF — malware analysis report

Static analysis result for SHA-256 50a0baf7e6ac2df6…

MALICIOUS

PDF

60.9 KB Created: 2020-08-29 22:21:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bcc3773e3cec6d2e616f0bb2355116e0 SHA-1: ebb443535913534bb4d5ce227395dffcd37be59e SHA-256: 50a0baf7e6ac2df62d0cdf2f960fa41198a573b8b93553ff70a5197c77cb8808
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs. The ML classifier strongly indicates maliciousness. The primary attack vector appears to be luring the user to the malicious URL via the embedded link.

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.com/wix?keyword=el+estado+absolutista+en+francia
    • https://static.usrfiles.com/ugd/b8c837_ec46b9046ca94cfe850ab314226bdc4f.pdf
    • https://static.usrfiles.com/ugd/b8c837_29692869cf324ca78c9d3388ca0ca43f.pdf
    • https://static.usrfiles.com/ugd/b8c837_e51e4b763c4d4ca480252d4b11fa2a4e.pdf
    • https://static.usrfiles.com/ugd/b8c837_33284a30091f4077a062a2edbcfe5c9e.pdf
    • https://static.usrfiles.com/ugd/b8c837_f0df0ede68d24257857ef5e4911b38e9.pdf
    • https://cdn.shopify.com/s/files/1/0429/1470/9663/files/85042538193.pdf
    • https://cdn.shopify.com/s/files/1/0434/5466/0758/files/95742533150.pdf
    • https://cdn.shopify.com/s/files/1/0431/6318/9412/files/jisanugofazu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9060/8285/files/love_stage_ep_1_english_sub.pdf
    • https://cdn.shopify.com/s/files/1/0440/2230/0822/files/san_andreas_mod_intaller.pdf
    • https://cdn.shopify.com/s/files/1/0457/8620/2278/files/xumimarimorokusuzizufabo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2187/6900/files/rilaguxe.pdf
    • https://static.usrfiles.com/ugd/b8c837_275cda56b0994275b542f2aee5bec5c1.pdf
    • https://static.usrfiles.com/ugd/b8c837_133699766a68417d99bdd95685438f55.pdf
    • https://static.usrfiles.com/ugd/b8c837_dc75acbff4444436856a2d8a458f12a5.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_off0000acb2.bin
c25877429a5ae50c2efa9173f4c1db6975815814aeb444e9784041975af67b37		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACB2 5112 bytes
font_01_sfnt_off0000be22.bin
4b192c693b0332592b37b56ee85eb6566177368582a863557eb4f5009c61fe15		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE22 12276 bytes

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