Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bf6b680e611ded7…

MALICIOUS

PDF

43.0 KB Created: 2020-08-20 06:01:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5bf7499f13a85f1bcef9fdf6d5788e1 SHA-1: 4c03a183dbb1f98407d68771c4dc781c05cbbe07 SHA-256: 4bf6b680e611ded71ab03c6668059ce8630a03e3b2bfc906ea3468088cb99461
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lure users to malicious content. The document also functions as a link farm, directing users to numerous other PDFs hosted on Shopify, likely for SEO manipulation or to obscure the malicious redirector. The ML classifier strongly indicates maliciousness.

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=aldol+condensation+product+between+formaldehyde+and+acetaldehyde
    • http://files.filmbandits.org/uploads/1/3/0/7/130738903/6f3e10.pdf
    • http://files.plbra.org/uploads/1/3/0/8/130873893/131952.pdf
    • http://files.rubycopper.vn/uploads/1/3/1/6/131606155/6564262.pdf
    • http://sogose.williamogmundson.com/uploads/1/3/1/1/131164456/tiwolew.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/49992715561.pdf
    • https://cdn.shopify.com/s/files/1/0427/5588/3175/files/isomerism_class_11.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6976/files/vigew.pdf
    • https://cdn.shopify.com/s/files/1/0427/6604/1244/files/kakodojikowota.pdf
    • https://cdn.shopify.com/s/files/1/0432/6070/6971/files/12_weeks_pregnant_scan_report.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/33504122857.pdf
    • https://cdn.shopify.com/s/files/1/0435/6574/4287/files/11863492429.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_off00005cdc.bin
5ba116741771fe286bc21174e881849962f0a17900c0d183886fc6df50a2422a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CDC 5716 bytes
font_01_sfnt_off00007033.bin
548982a5ab3d499624b5205c22c73da7d918a4ad979e03624954a94603839afb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7033 15220 bytes

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