Malicious PDF — malware analysis report

Static analysis result for SHA-256 348f3b27a49e7015…

MALICIOUS

PDF

41.0 KB Created: 2020-08-25 05:11:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c12fa0c1b1fdf3a8c34e04c3032b8c2a SHA-1: 54a594f8bb952db66e6ee69a7e2a823b5e9e9c8c SHA-256: 348f3b27a49e7015a1037ca03a7ffd04ae0343f022b36c3890d1f74303248ad2
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that points to a URL designed to lure users with a 'stock certificate template' keyword. This link is part of a larger link farm, suggesting a phishing or scam attempt. The ML classifier also strongly indicated maliciousness. No scripts were extracted, so the exact second-stage payload is unknown, but the intent is clearly to redirect the user to a malicious site.

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.ru/pify?keyword=stock+certificate+template+google+docs
    • http://mudij.step-by-step-declutter.com/uploads/1/3/0/8/130874257/pegaxexitof.pdf
    • http://files.kickapoovolleyball.com/uploads/1/3/0/7/130739155/gujulivumetuki_niramafi.pdf
    • https://cdn.shopify.com/s/files/1/0429/2050/9596/files/bulletproof_diet_shopping_list.pdf
    • https://cdn.shopify.com/s/files/1/0438/5056/3734/files/legokemilokabuguwa.pdf
    • https://cdn.shopify.com/s/files/1/0435/0912/1184/files/pisoge.pdf
    • https://cdn.shopify.com/s/files/1/0428/7430/6719/files/vosamezofolow.pdf
    • https://cdn.shopify.com/s/files/1/0430/0183/9775/files/photoshop_portable_download.pdf
    • https://cdn.shopify.com/s/files/1/0465/9642/3845/files/low_platform_wooden_bed_frame.pdf
    • https://cdn.shopify.com/s/files/1/0432/5661/0979/files/belisutej.pdf
    • https://cdn.shopify.com/s/files/1/0434/4355/2416/files/60790011597.pdf
    • https://cdn.shopify.com/s/files/1/0429/5432/6179/files/taveravuxurafolu.pdf
    • https://cdn.shopify.com/s/files/1/0438/0088/7457/files/kefegolejowamag.pdf
    • https://cdn.shopify.com/s/files/1/0430/1606/1091/files/26727509844.pdf
    • https://cdn.shopify.com/s/files/1/0429/1425/0905/files/binixovawugurekikuda.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_off00006352.bin
f74900774d477514faba1041edcce26a35227813d7bf056ae322fbc3d011887f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6352 5640 bytes
font_01_sfnt_off00007661.bin
1e23cd376107452c24ae3cca9e509aa4f3e710ce4b5545e5d972b094f363b5bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7661 9624 bytes

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