Malicious PDF — malware analysis report

Static analysis result for SHA-256 1af21d0174b10381…

MALICIOUS

PDF

48.6 KB Created: 2020-08-30 02:29:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab00d45f321f3b0a6373de15d98b1b8a SHA-1: c4dcf56bd2abe38c76730943f4102b3bed00787c SHA-256: 1af21d0174b10381d9ebfa1605546185ff0d0fe79c5f82a38e92e0e3aab96e7b
150 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating that it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text that appears to be an 'Accenta 8 alarm installation manual' and a URL that matches the malicious redirector. This suggests a social engineering lure to trick the user into clicking the malicious link.

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.club/wix?keyword=accenta+8+alarm+installation+manual
    • https://static.usrfiles.com/ugd/b8c837_33577a52336a415ea93165f1e69288e7.pdf
    • https://static.usrfiles.com/ugd/5de1df_65146924c0e843d3be26e9d6a77cbe4e.pdf
    • https://static.usrfiles.com/ugd/74c34a_925e28dfc14148d2ad418df81f0af0b8.pdf
    • https://static.usrfiles.com/ugd/576447_622989201eb44b00b64918b0fe195095.pdf
    • https://static.usrfiles.com/ugd/865d50_d1352acb1ba84ab8a659ddf7218d7a50.pdf
    • https://cdn.shopify.com/s/files/1/0435/6558/0437/files/intel_hd_4600_graphics.pdf
    • https://cdn.shopify.com/s/files/1/0462/1418/5113/files/rojogirexagulumiguret.pdf
    • https://cdn.shopify.com/s/files/1/0438/8916/4440/files/73512853504.pdf
    • https://static.usrfiles.com/ugd/0c8cc8_a328bf9c6def42b4af857fc1feb982de.pdf
    • https://static.usrfiles.com/ugd/b8c837_bddf7b4514c247c1be2646bd05302187.pdf
    • https://static.usrfiles.com/ugd/b8c837_d2bfe7550c034fc0a0d9026a4d0f3553.pdf
    • https://static.usrfiles.com/ugd/b8c837_00dd6d23b30d4a7fa91d0b87e0244c30.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_off00007ee0.bin
ed051e68835b68338dfb21aad49e5b2d7f7fe060d473edf71030460257aec2ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE0 5128 bytes
font_01_sfnt_off00009026.bin
7885ef55b095940a0a676a9ab52739cf8cc0450905ada5984c86d8ec422203ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9026 11028 bytes

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