Malicious PDF — malware analysis report

Static analysis result for SHA-256 da4843c42e21002e…

MALICIOUS

PDF

41.1 KB Created: 2020-08-29 23:17:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0fdd40de933ca06d6e10b801bc643e07 SHA-1: ceeac48881506e2420e4509f9343b64cf0c0c489 SHA-256: da4843c42e21002ec925d5839c4bea8f95bdb1fe34504478d6a7c1d89b6a79d2
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a critical heuristic indicating a link to known malicious redirector infrastructure. The document body contains the URL https://ttraff.com/wix?keyword=coloration+au+bleu+de+m%2525C3%2525A9thyl%2525C3%2525A8ne, which is likely the entry point for a malicious download or phishing attempt. Additionally, the PDF contains a large number of external links, suggesting a link farm or SEO poisoning tactic to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.com/wix?keyword=coloration+au+bleu+de+m%2525C3%2525A9thyl%2525C3%2525A8ne
    • https://static.usrfiles.com/ugd/b8c837_c321cd97bda148b1b0adf5f51a114df3.pdf
    • https://static.usrfiles.com/ugd/b8c837_e757375a2f61453780039d14ca246615.pdf
    • https://static.usrfiles.com/ugd/b8c837_f47ab693e40c4d2d8411d679fbc148b2.pdf
    • https://static.usrfiles.com/ugd/b8c837_9aca49ea31594a109a20ed3c7ee84c10.pdf
    • https://static.usrfiles.com/ugd/b8c837_e5cb08bb1ce948bca0a88109ccda71a8.pdf
    • https://cdn.shopify.com/s/files/1/0432/3724/5085/files/performance_appraisal_methods_in_hrm.pdf
    • https://cdn.shopify.com/s/files/1/0439/1269/1867/files/rufagubawusosobim.pdf
    • https://cdn.shopify.com/s/files/1/0431/6440/1818/files/weather_report_of_dibrugarh_this_week.pdf
    • https://static.usrfiles.com/ugd/b8c837_fe841c115bfb49aa8d8d46418d8f5705.pdf
    • https://static.usrfiles.com/ugd/b8c837_6e6e44d4e4bf4eafb1fee7e3daa17d38.pdf
    • https://static.usrfiles.com/ugd/ace02d_eb72aa05558e437e8c1d9e2c5b7bd75c.pdf
    • https://static.usrfiles.com/ugd/b8c837_309a309bfe6143808f7624433e6b85f0.pdf
    • https://static.usrfiles.com/ugd/b8c837_5d995f8dd9fc4b71bd66e35351a8146f.pdf
    • https://static.usrfiles.com/ugd/ec0c41_718625b51408485b84b98d85c1eb0b43.pdf
    • https://static.usrfiles.com/ugd/b8c837_3b3527c73ac24d6a9bbd2221b5c5f88d.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_off0000608b.bin
01a87e7f6537232be7fa53e6443880ac70636f763b3a6502d9f0c0c762afe510
pdf-font-stream PDF embedded font (sfnt) at offset 0x608B 5316 bytes
font_01_sfnt_off000071d5.bin
7ab3b1551e79bc2069acabca4de8735d0a6bd4aa85e108f5ceba8f81adee604e
pdf-font-stream PDF embedded font (sfnt) at offset 0x71D5 10700 bytes