Malicious PDF — malware analysis report

Static analysis result for SHA-256 26d11737c65b6df8…

MALICIOUS

PDF

33.1 KB Created: 2020-08-30 09:02:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd4088145e37f3eec342cee4d75f7ccc SHA-1: 315482f7de1d99c8826fa9fa4fdbfa392aa408db SHA-256: 26d11737c65b6df8983cc0c520c74eb1d7781feed294a12b4bcbb37107aeb61d
150 Risk Score

Malware Insights

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

The PDF was flagged for containing a malicious redirector link and a link farm. The primary malicious URL, https://ttraff.ru/wix?keyword=rimworld+orbital+trade+beacon, is likely used to direct users to a malicious site. The document also contains numerous links to PDFs hosted on cdn.shopify.com, which is characteristic of SEO poisoning or link farm techniques to improve search engine ranking for malicious content.

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=rimworld+orbital+trade+beacon
    • https://cdn.shopify.com/s/files/1/0433/1307/0238/files/tubag.pdf
    • https://cdn.shopify.com/s/files/1/0431/4228/3432/files/58513900037.pdf
    • https://cdn.shopify.com/s/files/1/0434/5757/7122/files/54556407742.pdf
    • https://cdn.shopify.com/s/files/1/0437/5828/9045/files/35495999155.pdf
    • https://cdn.shopify.com/s/files/1/0461/5539/9331/files/fidazibevopujakuzogebige.pdf
    • https://static.usrfiles.com/ugd/b8c837_09713577ce644ad68f9d70b570caef47.pdf
    • https://static.usrfiles.com/ugd/b8c837_042c7a517b0643419b96d90e413b3267.pdf
    • https://static.usrfiles.com/ugd/a18aa6_2740213a3307413a9c3f24989a557602.pdf
    • https://static.usrfiles.com/ugd/b8c837_f21874f4e02c488e9fd7f7abb3329ddd.pdf
    • https://cdn.shopify.com/s/files/1/0432/8023/6702/files/2_letter_airline_codes.pdf
    • https://cdn.shopify.com/s/files/1/0430/5531/7149/files/xikefafawi.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_off0000450d.bin
7d3922f40f55da1c332485cc5b15ab28da102fec20f9884d56df9a4439c22996		 pdf-font-stream PDF embedded font (sfnt) at offset 0x450D 5148 bytes
font_01_sfnt_off00005686.bin
1c76064827b2d2c4f6bc9756bcb43c7538019691cb60a7d1389f6aa59c6a34b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5686 9764 bytes

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