Malicious PDF — malware analysis report

Static analysis result for SHA-256 d54a38380bc9f7dd…

MALICIOUS

PDF

40.2 KB Created: 2020-08-06 09:06:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3940197c77c9dce8aa3070b140f9e67 SHA-1: 1ecafe48e323aa15bc4054a66fffffd89302c433 SHA-256: d54a38380bc9f7dd89b07dfcbc996edf9cfc272e65cc114afced410c243a4a59
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is also present in the document body. This indicates an attempt to redirect users to malicious infrastructure under the guise of providing 'handwriting exercises for beginners pdf'. The PDF also exhibits characteristics of a link farm, suggesting it's part of a larger SEO poisoning or content-spamming operation designed to attract clicks to malicious sites.

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.com/pify?keyword=handwriting+exercises+for+beginners+pdf
    • http://files.dvrgeclothing.ca/uploads/1/3/2/6/132695294/2329e5a732.pdf
    • http://files.usaboxingdfw.com/uploads/1/3/0/7/130776204/2100995.pdf
    • http://files.nighthawkgolfcenter.com/uploads/1/3/0/7/130738841/pigamisovob.pdf
    • http://files.vegantogosxm.com/uploads/1/3/1/1/131163890/cc9fe118d26791.pdf
    • https://cdn.shopify.com/s/files/1/0433/3443/4969/files/public_policy_and_management_books.pdf
    • https://cdn.shopify.com/s/files/1/0430/1648/7065/files/4021899241.pdf
    • https://cdn.shopify.com/s/files/1/0437/1116/8664/files/degowukosizuvowipixonugo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3206/7748/files/37694516863.pdf
    • https://cdn.shopify.com/s/files/1/0432/2649/7182/files/60926971496.pdf
    • https://cdn.shopify.com/s/files/1/0428/9937/4233/files/24513766226.pdf
    • https://cdn.shopify.com/s/files/1/0431/2399/8874/files/dipuvisejejokutipop.pdf
    • https://cdn.shopify.com/s/files/1/0432/8354/6267/files/vuwurelapufowunolepiw.pdf
    • https://cdn.shopify.com/s/files/1/0432/5045/0600/files/guia_para_aprender_espanhol.pdf
    • https://cdn.shopify.com/s/files/1/0435/9330/2178/files/12665074970.pdf
    • https://cdn.shopify.com/s/files/1/0431/5817/5893/files/49281202901.pdf
    • https://cdn.shopify.com/s/files/1/0432/5618/4992/files/60956053738.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_off0000613b.bin
7bea0a5857aa0ef6cb2f06ce58208740158759b7ddddb677efc0a1bdcb11ec35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x613B 5552 bytes
font_01_sfnt_off0000743e.bin
58dafb6f35cbe633e650531d87cb6e624e96c9b69ad66972ed9fc822d4b4e05d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x743E 9268 bytes

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