Malicious PDF — malware analysis report

Static analysis result for SHA-256 af380563cf481184…

MALICIOUS

PDF

36.8 KB Created: 2020-08-30 17:59:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0714279aa1045159d0b4103cfb5bc60 SHA-1: b1f2512cb51fdde5377ce4a287219a759c04fde7 SHA-256: af380563cf48118410bb7786db5de1c03f0cee152f2301d72ea969c0c6f05b0c
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The primary malicious URL identified is https://ttraff.ru/wix?keyword=www.+dsconverter.+com, which is likely used to redirect users to further malicious content. The document body, though heavily obfuscated, also contains this URL and numerous other links pointing to external resources, reinforcing the attack pattern of a link farm designed for redirection.

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.ru/wix?keyword=www.+dsconverter.+com
    • https://static.usrfiles.com/ugd/b8c837_30ca9d38d8474d549094ef80b5c05124.pdf
    • https://static.usrfiles.com/ugd/fac845_d0f2d8da142d42678b010fac7d0f4ddc.pdf
    • https://static.usrfiles.com/ugd/33c377_5d98f6dacb954bc5894d940a9fb28dd4.pdf
    • https://cdn.shopify.com/s/files/1/0428/5494/0828/files/list_of_different_google_dorks.pdf
    • https://cdn.shopify.com/s/files/1/0438/3680/1181/files/vewasaximemati.pdf
    • https://static.usrfiles.com/ugd/b8c837_8341131268b34d49abf5fd162fc899af.pdf
    • https://static.usrfiles.com/ugd/b8c837_90b894dfaf584e44b82e71d2bf24d862.pdf
    • https://static.usrfiles.com/ugd/5899d5_54759bd7c81f4923b3827e4147fb799a.pdf
    • https://static.usrfiles.com/ugd/d1c05f_7a79b5e52cba4e70b0968993906fd7ec.pdf
    • https://cdn.shopify.com/s/files/1/0435/4146/3204/files/xuvulisawele.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53607129813.pdf
    • https://cdn.shopify.com/s/files/1/0433/7880/2846/files/68065158579.pdf
    • https://cdn.shopify.com/s/files/1/0435/0954/7174/files/juluziz.pdf
    • https://cdn.shopify.com/s/files/1/0449/5346/9083/files/antibioticos_para_la_piel.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_off000052c0.bin
e36943c18ae142051368c521bd08bbe7a19ef165428ce14906779a154ea89a9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52C0 5040 bytes
font_01_sfnt_off000063ef.bin
e7ae7bafeff85ba8a0d44d34a524ec8ed658f9f96effa73d0bd0b39c29314eaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63EF 10276 bytes

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