Malicious PDF — malware analysis report

Static analysis result for SHA-256 28a26b3eeb6df67f…

MALICIOUS

PDF

40.0 KB Created: 2020-08-24 01:27:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba1a6c0d28255a2032b2e9dae5a511c4 SHA-1: 52d38c5a23af0bff8a1be385151fd07ecd72411e SHA-256: 28a26b3eeb6df67f153ed1924f0d911da7627ab725b8be3d3ac39dcb0730f1aa
150 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The primary malicious URL identified is https://ttraff.com/pify?keyword=tor+browser++folder, which is likely used to funnel users to further malicious content. The document body contains garbled text but also includes the same redirector URL, reinforcing its malicious intent. The extensive list of Shopify URLs suggests a tactic to obscure the true malicious destination.

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=tor+browser++folder
    • http://files.sue-rowland.com/uploads/1/3/1/4/131408103/7608145.pdf
    • https://cdn.shopify.com/s/files/1/0435/6590/8136/files/xezitazugojigajapuroro.pdf
    • https://cdn.shopify.com/s/files/1/0433/0523/8692/files/rowonudi.pdf
    • https://cdn.shopify.com/s/files/1/0439/6508/7902/files/bmo_harris_app_android.pdf
    • https://cdn.shopify.com/s/files/1/0435/3166/5562/files/regurusibalozojoj.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6141/files/66690514059.pdf
    • https://cdn.shopify.com/s/files/1/0429/4737/9356/files/roblox_shirt_template_transparent_png.pdf
    • https://cdn.shopify.com/s/files/1/0431/4388/9058/files/xepimalake.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6261/files/nukevarevakila.pdf
    • https://cdn.shopify.com/s/files/1/0434/3716/2646/files/acute_pancreatitis_management_guidelines_2017.pdf
    • https://cdn.shopify.com/s/files/1/0439/6669/3534/files/xebagugiw.pdf
    • https://cdn.shopify.com/s/files/1/0433/7798/3653/files/wilaminizenu.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_off0000619d.bin
a5870b4851f04bf81e92ea2f81d20745601c2fa407a41ff5c2254db49224787c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x619D 4872 bytes
font_01_sfnt_off0000724e.bin
1d634edac01ca224530fddbd173f8eb9aad14ef1bed6681ed3fb3530687f3a35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x724E 9780 bytes

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