Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bb2d9e016ce83e0…

MALICIOUS

PDF

45.8 KB Created: 2020-08-29 19:57:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8f57bfa6bbbd692da963106e8855151 SHA-1: f0de01e9c249f0acfb61829474edec6609c4853e SHA-256: 8bb2d9e016ce83e0105fe34e78e0b0682cdfceabb477e09a2493b7f728c33335
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, pointing to ttraff.ru. The document body, though heavily obfuscated, contains text related to a 'prayer of jabez study guide' and also includes the malicious URL. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, likely for SEO manipulation to increase visibility. The ML classifier strongly flagged this PDF as malicious.

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=prayer+of+jabez+study+guide
    • https://cdn.shopify.com/s/files/1/0430/8906/8185/files/amsterdam_map_download.pdf
    • https://cdn.shopify.com/s/files/1/0449/0720/0667/files/electronics_projects_for_engineering_students.pdf
    • https://cdn.shopify.com/s/files/1/0430/0495/2735/files/37307575950.pdf
    • https://static.usrfiles.com/ugd/b8c837_020fe300be4e4cbbadafe8ae2b3033d0.pdf
    • https://cdn.shopify.com/s/files/1/0438/0511/4528/files/vascular_malformations_clinic_austin_texas.pdf
    • https://cdn.shopify.com/s/files/1/0431/8347/2802/files/safafivokijari.pdf
    • https://cdn.shopify.com/s/files/1/0435/1836/1755/files/50561902259.pdf
    • https://cdn.shopify.com/s/files/1/0437/7686/8510/files/nonajudonamelizofap.pdf
    • https://cdn.shopify.com/s/files/1/0436/0188/7396/files/isabella_oliver_size_guide.pdf
    • https://static.usrfiles.com/ugd/b8c837_7126a32b991b40a094026de72dcea7e8.pdf
    • https://static.usrfiles.com/ugd/166c09_e80cefc63d1348199e55ec97423c8b28.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000688c.bin
92e398edf75d5c2d0c2112fef93e8c89a4e75555fdc4bc655441824c527051b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x688C 5188 bytes
font_01_sfnt_off00007a51.bin
b5fba755142f3fc8b1d00ca0a91d2a073664b7c26afbcb406958d7425bc76d7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A51 10088 bytes
font_02_sfnt_off00009cc8.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CC8 4324 bytes

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