Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6e7c7dff8a71a3e…

MALICIOUS

PDF

37.4 KB Created: 2020-08-29 14:45:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 734fa36170aaf6b11e6c7a12ef97ad3b SHA-1: e5c6998e9794f1870c7d55a2cfb61d19121d2d4a SHA-256: c6e7c7dff8a71a3ee49f9df5758f433bbe5c70d2e34f8a5e75a89c511d6a7333
120 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, with a critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for a 'biology lab manual'. The primary malicious URL is ttraff.club, which redirects to a PDF hosted on Shopify. This suggests a phishing or social engineering attack aiming to redirect users 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.club/wix?keyword=investigating+biology+lab+manual+pdf
    • https://cdn.shopify.com/s/files/1/0427/3097/9495/files/81094591632.pdf
    • https://cdn.shopify.com/s/files/1/0429/7247/9647/files/vovidazogopozopin.pdf
    • https://cdn.shopify.com/s/files/1/0433/6504/0286/files/57115769253.pdf
    • https://static.usrfiles.com/ugd/b8c837_1650374fc8614efea1a357f864cfc078.pdf
    • https://cdn.shopify.com/s/files/1/0440/6149/1365/files/bash_prompt_for_input.pdf
    • https://cdn.shopify.com/s/files/1/0431/0358/4409/files/jest_generate_test_coverage_report.pdf
    • https://cdn.shopify.com/s/files/1/0433/7949/0968/files/formal_letter_for_annual_leave_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61086590007.pdf
    • https://cdn.shopify.com/s/files/1/0435/3448/3605/files/74895997206.pdf
    • https://cdn.shopify.com/s/files/1/0430/8310/4409/files/jirigebepugisunej.pdf
    • https://cdn.shopify.com/s/files/1/0430/5495/6695/files/28606983057.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_off00005462.bin
27abd28bca614b3b6ad5b4e71c8de4d098457f7fdce6b50a1eb1eb62f1ec9724		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5462 5504 bytes
font_01_sfnt_off0000670c.bin
65721a87f5ae8aaaca0d2d8b84edd98f0cd913ada17288a3332bd48230fffbab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x670C 10208 bytes

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