Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1ba451e82f929c5…

MALICIOUS

PDF

49.9 KB Created: 2020-08-29 15:40:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 995d16071d577e47449d81610dfe576f SHA-1: be54bea3016be9587bce4c2088d1d283ca61f79e SHA-256: b1ba451e82f929c53ceb7f42d2d952244792151ee64bec6b18b59b0e197060a1
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, a technique often used for SEO poisoning or to redirect users to malicious sites. One of the primary links points to a known malicious redirector. The document body contains garbled text but includes the malicious URL, suggesting an attempt to disguise the malicious intent. No scripts were extracted from this sample.

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=juegos+modificados+de+cancha+dividida
    • https://static.usrfiles.com/ugd/b8c837_990eb5abec404b51bbfc6f0bc9778493.pdf
    • https://static.usrfiles.com/ugd/b8c837_964d35a497eb428086be5af45f294145.pdf
    • https://static.usrfiles.com/ugd/b8c837_22406a0802ac4a48bad1ab99446b413f.pdf
    • https://cdn.shopify.com/s/files/1/0432/5169/5771/files/26218543762.pdf
    • https://cdn.shopify.com/s/files/1/0461/8318/6585/files/clarisonic_mia_fit_user_guide.pdf
    • https://static.usrfiles.com/ugd/b8c837_af72aca50d734bd9a68d15acaaca2ada.pdf
    • https://static.usrfiles.com/ugd/c618e9_1c1875002179449b8a4c4b2c6292fbb3.pdf
    • https://static.usrfiles.com/ugd/b8c837_b2a7b9e453ab42369fa6184c26b403f4.pdf
    • https://static.usrfiles.com/ugd/2f8cea_a857f172095842abb0c5a5993e3d5902.pdf
    • https://static.usrfiles.com/ugd/6cf392_ae14a913c19f45c8a8dac3b664caaf93.pdf
    • https://static.usrfiles.com/ugd/b8c837_b29f45de7f814aa08cb9222f53663492.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_off00008361.bin
7cc0c07da125d8002dcc903ebbe195033e806557c6d63c198787173d354468a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8361 5356 bytes
font_01_sfnt_off00009578.bin
b11cd762dc9b724c775fd4fe7b6810fd565dbf2af62f997da78560b6eb74dcc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9578 11124 bytes

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