Malicious PDF — malware analysis report

Static analysis result for SHA-256 e69435608c140991…

MALICIOUS

PDF

118.6 KB Created: 2020-08-31 02:29:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0738c93ad92152b42caabf3d2846f18f SHA-1: 140c8fcecdc00dacae7d93351c42efcf6e36aeda SHA-256: e69435608c14099130fd49b7d91791bd3e550bc0b67766d92921a27206b585c3
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, specifically pointing to 'https://ttraff.ru/wix?keyword=apostila+geometria+analitica+pdf'. This indicates the document's primary purpose is to redirect users to potentially harmful content. The presence of a large number of external PDF links also suggests a link farm or SEO manipulation tactic. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the exact lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=apostila+geometria+analitica+pdf
    • https://static.usrfiles.com/ugd/87a178_37c241a84e4643a3a4eb6dd719b7fffb.pdf
    • https://static.usrfiles.com/ugd/b8c837_0d31c83dd93d40718000d1c4f115d4f3.pdf
    • https://static.usrfiles.com/ugd/77d535_632958eacd414da4b9f5be8badbc133f.pdf
    • https://static.usrfiles.com/ugd/b8c837_abdea59f2c09443eb3448a52612afc84.pdf
    • https://static.usrfiles.com/ugd/b8c837_49fd2b057b5b41568275c7033bf8a8b4.pdf
    • https://cdn.shopify.com/s/files/1/0438/9843/7784/files/8272960451.pdf
    • https://static.usrfiles.com/ugd/b8c837_81e8c549e290426da2139fed73d8dbea.pdf
    • https://static.usrfiles.com/ugd/71fd01_12866bb556fa44238716fbb6f4914354.pdf
    • https://cdn.shopify.com/s/files/1/0432/1955/0370/files/veladakuseve.pdf
    • https://cdn.shopify.com/s/files/1/0432/8351/3494/files/17577141403.pdf
    • https://cdn.shopify.com/s/files/1/0449/7742/2494/files/automobile_car_parts.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000163af.bin
6e2d856a1cd75b915912a214a6c9f2f9b81124ddd7a5e77ad47f7c41bf2d9adf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x163AF 5464 bytes
font_01_sfnt_off00017625.bin
abb433030d8a6877e587aaf926b8471770ad78765f9385fc1ee24e40017c0480		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17625 2636 bytes
font_02_sfnt_off000180e0.bin
670da6141fe68595a717054d5cc30b260866275b1a9774bedb1397b4ecb3f995		 pdf-font-stream PDF embedded font (sfnt) at offset 0x180E0 17980 bytes
font_03_sfnt_off0001b774.bin
f56302d1894accadf46570a9eeb5e916c9d4c231ae7e8cd3df28995770b80da3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B774 16276 bytes

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