Malicious PDF — malware analysis report

Static analysis result for SHA-256 453b9eeffc9a83fa…

MALICIOUS

PDF

43.9 KB Created: 2020-08-04 01:30:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0445de176d90d658cb9007255d61125e SHA-1: 3004815c7d5b8815aad6f098bdd6cb1fdd659912 SHA-256: 453b9eeffc9a83fa78c0ff1d705d006a4cb461bf3b0602b41b230219f4291278
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=analogue+and+digital+electronics+pdf, which is likely used to redirect users to a malicious site. Additionally, the PDF contains a link farm, with many links pointing to Shopify domains, suggesting an attempt to obscure the true destination or leverage benign domains for distribution.

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=analogue+and+digital+electronics+pdf
    • http://files.mgfundraiser.com/uploads/1/3/1/4/131438180/seboziti.pdf
    • http://files.devinbeliveau.com/uploads/1/3/0/7/130739099/8af6d537ac92c.pdf
    • http://files.storyofhoperochester.com/uploads/1/3/0/7/130776661/3d0f37ef08.pdf
    • https://cdn.shopify.com/s/files/1/0432/1551/9912/files/44000159530.pdf
    • https://cdn.shopify.com/s/files/1/0437/3577/7445/files/72653220076.pdf
    • https://cdn.shopify.com/s/files/1/0430/8012/2532/files/nenikiwawewita.pdf
    • https://cdn.shopify.com/s/files/1/0430/2045/1997/files/74284221515.pdf
    • https://cdn.shopify.com/s/files/1/0433/9580/9431/files/sekevupu.pdf
    • https://cdn.shopify.com/s/files/1/0439/2943/6315/files/vokeme.pdf
    • https://cdn.shopify.com/s/files/1/0436/0473/8206/files/learn_to_speak_portuguese.pdf
    • https://cdn.shopify.com/s/files/1/0431/7511/6959/files/wurunaluwunelasewe.pdf
    • https://cdn.shopify.com/s/files/1/0431/1918/1978/files/49152499477.pdf
    • https://cdn.shopify.com/s/files/1/0436/7722/1017/files/42151233009.pdf
    • https://cdn.shopify.com/s/files/1/0430/8402/1921/files/tolafow.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_off00006485.bin
fe8038064b23c58a211e5458e2702e0aa2d54dcde2286716b711400b82da70cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6485 5312 bytes
font_01_sfnt_off000076a7.bin
f87eae9980d8e51d47e416ddd7dcc71c95ddae8fa5b270ceceb9487567c8b231		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76A7 14204 bytes

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