Malicious PDF — malware analysis report

Static analysis result for SHA-256 b57e7299af043e47…

MALICIOUS

PDF

43.5 KB Created: 2020-08-29 22:05:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd1b48b7a0891b552476b4dc68e875fe SHA-1: 9b920248eb3a7087e004184ad28c0afa83fe945f SHA-256: b57e7299af043e47cf2c7adb3947795fb3ad9f2391d5095da5a97f10bfe61873
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique often used to create link farms for SEO manipulation or to redirect users to malicious sites. One of the primary links points to 'ttraff.ru', which is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness.

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=moon+square+venus+composite
    • https://static.usrfiles.com/ugd/b8c837_c501d8fa13944c5da4245ccb5664cdc9.pdf
    • https://static.usrfiles.com/ugd/b8c837_786f21961f584894a3c225790d04a6a3.pdf
    • https://static.usrfiles.com/ugd/b8c837_f9e1d09f19614707b9afe083cfef4409.pdf
    • https://static.usrfiles.com/ugd/b8c837_07d0c78823af452eb49be98f48523b22.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3581/files/10329907915.pdf
    • https://static.usrfiles.com/ugd/0a593f_78ceee5b45b1496f9cfe5d3b5ac9396e.pdf
    • https://static.usrfiles.com/ugd/097bd5_c717888a62e34c7aa8c1ea61ebd3d207.pdf
    • https://static.usrfiles.com/ugd/b8c837_31ae5b9fda44486e9c06b3ae4c9525ad.pdf
    • https://cdn.shopify.com/s/files/1/0436/5107/2158/files/cakewalk_sonar_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/7214/4038/files/24012256613.pdf
    • https://cdn.shopify.com/s/files/1/0428/1561/9239/files/3835092919.pdf
    • https://cdn.shopify.com/s/files/1/0432/0146/2436/files/buzumenosoge.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_off00006d70.bin
0c1d1b57df2829390d6e01486f4143dbc34a5d43e7b1ae65773ee1c56baa4fbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D70 5240 bytes
font_01_sfnt_off00007f38.bin
7e4a947d00dd0ac5923e52c93b9cfceeeea055f892b409813bf61d2afaae730c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F38 10012 bytes

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