Malicious PDF — malware analysis report

Static analysis result for SHA-256 5535369a31835796…

MALICIOUS

PDF

47.7 KB Created: 2020-08-31 06:59:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 760b5de907563d1fc9cbd74331d03043 SHA-1: e36562c8526c5aa506b052f13317a82e136e3846 SHA-256: 5535369a318357963ae9d64703cbfc224a1dd1753e85059293fed395326eafee
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a link farm. One of these links, https://ttraff.ru/wix?keyword=fire+emblem+echoes+shadows+of+valentia+classes, points to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to contain keywords related to the linked content, suggesting a lure. The primary attack pattern involves redirecting users through a chain of links, ultimately leading to malicious content.

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=fire+emblem+echoes+shadows+of+valentia+classes
    • https://static.usrfiles.com/ugd/e4bc37_1eac665c5e55403784b27f74434d8f2f.pdf
    • https://static.usrfiles.com/ugd/72216b_303c3d59a68f438bb97d3f6f57ab51ae.pdf
    • https://static.usrfiles.com/ugd/b8c837_4101ed6d31234ea5a6c78f6d21b6cf85.pdf
    • https://static.usrfiles.com/ugd/ac72e0_5239c0b48f9d4b3aa237fc17ecfdaf35.pdf
    • https://cdn.shopify.com/s/files/1/0431/9268/0611/files/lexiteroziwumiferenu.pdf
    • https://cdn.shopify.com/s/files/1/0440/7332/0600/files/wutuvavojoborovomixu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4131/6264/files/adobe_illustrator_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0434/7510/7990/files/80638471916.pdf
    • https://cdn.shopify.com/s/files/1/0451/8277/9541/files/web_design_crash_course.pdf
    • https://cdn.shopify.com/s/files/1/0431/3533/6605/files/dijewamubij.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99237037604.pdf
    • https://cdn.shopify.com/s/files/1/0437/2958/4282/files/13072767063.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_off00006e67.bin
653acd2ea7161909a9bd7f4feb6bdbc212970f3455a809833422ac6e6dea7063		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E67 5296 bytes
font_01_sfnt_off00008044.bin
7b92387ed7d5cc3f72ae8d9a5b687662fb2a565002f19518d6bbbc1fd021c0a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8044 10336 bytes
font_02_sfnt_off0000a3aa.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3AA 4324 bytes

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