Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddeb0af7257c7357…

MALICIOUS

PDF

41.4 KB Created: 2020-08-16 15:49:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc4afa7a03664e22f7dd5226a3e174db SHA-1: df81c7cf2d45187b082694aa855778909bc70fe0 SHA-256: ddeb0af7257c73575755e59574f63a9310adef9ea77999ff57c4ee287157f6b9
150 Risk Score

Malware Insights

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

The PDF contains a link farm and a direct link to a known malicious redirector, ttraff.com. The document body, though heavily obfuscated, contains the same URL and keywords related to a physics worksheet, indicating a lure. The heuristic firings confirm the presence of malicious redirector links and a link farm, suggesting the primary goal is to redirect the user to malicious infrastructure.

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=gravitational+force+between+two+objects+worksheet
    • http://wevove.zagarefringe.com/uploads/1/3/0/8/130814020/48494.pdf
    • http://files.designsbycarolann.com/uploads/1/3/0/8/130814513/ac27058e6e8.pdf
    • http://files.savebozeman.org/uploads/1/3/1/4/131408529/80336d.pdf
    • http://kidesa.cumnockactionplan.org/uploads/1/3/1/6/131606289/3c85ea54ad0dbf.pdf
    • https://cdn.shopify.com/s/files/1/0431/3592/6434/files/96350183873.pdf
    • https://cdn.shopify.com/s/files/1/0430/3391/9645/files/31508720518.pdf
    • https://cdn.shopify.com/s/files/1/0439/0499/1400/files/bufunuvaxugikire.pdf
    • https://cdn.shopify.com/s/files/1/0440/6041/0021/files/nigow.pdf
    • https://cdn.shopify.com/s/files/1/0428/8138/4604/files/70196753066.pdf
    • https://cdn.shopify.com/s/files/1/0433/2381/8139/files/kebumopilerozinis.pdf
    • https://cdn.shopify.com/s/files/1/0432/7381/4182/files/minatomi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3179/7668/files/ford_mustang_brochure.pdf
    • https://cdn.shopify.com/s/files/1/0428/2780/8935/files/51239075777.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_off00005be6.bin
e4215c31ec7bd3dbcd73897931a31953ca002cba5c9d1330122a52dbd11276bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BE6 5432 bytes
font_01_sfnt_off00006e7c.bin
b4f9bad56318b5d350b1c4e1274a1009840fc878893aff36289994aab649a62d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E7C 13312 bytes

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