Malicious PDF — malware analysis report

Static analysis result for SHA-256 35408103d3ebc081…

MALICIOUS

PDF

41.4 KB Created: 2020-09-04 20:54:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d6db24d8768726be912ea2711b7c4d8 SHA-1: 5bbaf3d7cce63948e926a5b578f9302a509cd217 SHA-256: 35408103d3ebc0819d2da0bd9064c5176dba15f25e1b6dde2d7648f147e32221
120 Risk Score

Malware Insights

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

The PDF file contains a high number of embedded links, many pointing to external PDF files, indicating a link farm. One critical heuristic firing identified a link to a known malicious redirector infrastructure at 'ttraff.club'. The document body, though heavily obfuscated, contains the same URL, suggesting the primary purpose is to redirect the user to this malicious site, likely for phishing or malware delivery.

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=mandated+reporter+illinois+domestic+violence
    • https://static.usrfiles.com/ugd/b8c837_428b077b14644b6ab0bd1aaf80daee26.pdf
    • https://static.usrfiles.com/ugd/83b1b3_16e5127644d049698a578cef339e334e.pdf
    • https://static.usrfiles.com/ugd/b80405_6a8c3f5adb6e40e9b1bddd6c7b4877ff.pdf
    • https://static.usrfiles.com/ugd/0f5b72_d8ae7952069449cbbd3edc4a167e3229.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8806/files/kavisuru.pdf
    • https://cdn.shopify.com/s/files/1/0433/7850/7934/files/bizomubujaxegivevazuban.pdf
    • https://cdn.shopify.com/s/files/1/0433/7818/0259/files/impossible_quiz_no_15_answer.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/lazijitugidajiv.pdf
    • https://static.usrfiles.com/ugd/69b86f_9815a8464fac4e0885266ff582022720.pdf
    • https://static.usrfiles.com/ugd/b8c837_1334d9999e1d4ad9a5b3e24b57c48ae5.pdf
    • https://static.usrfiles.com/ugd/b8c837_16d781859c364d44bf916b5364f78662.pdf
    • https://static.usrfiles.com/ugd/e78b77_0e3927a1c8d64f79950de63d141ed767.pdf
    • https://static.usrfiles.com/ugd/b8c837_afc8f188e4a548d1bacb7fcad7aeffd4.pdf
    • https://static.usrfiles.com/ugd/12dc78_756bdff8331242d0aaf531cc45fc8138.pdf
    • https://static.usrfiles.com/ugd/60933b_4574f6912f0f476aac588749a95fbf6c.pdf
    • https://static.usrfiles.com/ugd/9d66c7_0d3caf507aab4c959c4f2fee565b929d.pdf
    • https://static.usrfiles.com/ugd/eb5a6a_ea46be0e7c2e47048ce246564d25f9d2.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_off0000639c.bin
e4b686bdf6cf031e058260bbe3e47ee7187304f925d9e7282a0e24c419dc9ab1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x639C 5284 bytes
font_01_sfnt_off0000758e.bin
87e38040c0eb9bf6778c211dd5057c0c3271bef04c22ed8ea753cf33cbadae83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x758E 10228 bytes

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