Malicious PDF — malware analysis report

Static analysis result for SHA-256 e384b3b4389f1d52…

MALICIOUS

PDF

41.3 KB Created: 2020-08-04 01:21:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1e9caea782224668cd7bc32c4a855a4 SHA-1: 7c8698670b5bebf0ae962795aeaea14922d0f107 SHA-256: e384b3b4389f1d529bd474d3a24de01d789f9cc47872d70af597b723316ebf12
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector (ttraff.com). The document body, though heavily obfuscated, appears to contain the URL to the redirector, suggesting a lure to a malicious site. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=panasonic+bread+maker+recipes+pdf
    • http://files.intotheworld.salvationarmymedia.org/uploads/1/3/0/9/130969148/e6e7bb8bd7.pdf
    • http://files.thecreativeshowcase.co.uk/uploads/1/3/0/9/130970003/8618351.pdf
    • http://files.thedystoniacollective.com/uploads/1/3/2/6/132681045/viboxujeg.pdf
    • http://files.moricara.com/uploads/1/3/1/8/131871494/keteziriwiz.pdf
    • https://cdn.shopify.com/s/files/1/0432/8803/5486/files/nemasipaluneko.pdf
    • https://cdn.shopify.com/s/files/1/0434/2631/6455/files/xomuvidunedaziwasokir.pdf
    • https://cdn.shopify.com/s/files/1/0432/2610/3971/files/nalanitoni.pdf
    • https://cdn.shopify.com/s/files/1/0436/0981/7251/files/9639296051.pdf
    • https://cdn.shopify.com/s/files/1/0431/1593/7948/files/48730902341.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3585/files/56974922978.pdf
    • https://cdn.shopify.com/s/files/1/0432/4284/8418/files/5341191648.pdf
    • https://cdn.shopify.com/s/files/1/0431/4107/1016/files/tapixagolafubaziwepi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9736/6436/files/87082715713.pdf
    • https://cdn.shopify.com/s/files/1/0435/2193/3466/files/japifaselujap.pdf
    • https://cdn.shopify.com/s/files/1/0434/6016/5797/files/kudekewerobetifide.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/masewusomarewisu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6306/6270/files/72738221920.pdf
    • https://cdn.shopify.com/s/files/1/0440/3747/2421/files/dabokebul.pdf
    • https://cdn.shopify.com/s/files/1/0431/0473/1300/files/busixokutijebifobuvef.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_off00006381.bin
672fdcdd2f7bd6ddeb6623a836dfd577a7f5045a927c06f6c838a51f28ff964e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6381 5476 bytes
font_01_sfnt_off00007602.bin
0e5e7a78b7e864630ba1946850db7893be1008777b284070287ad1305b349db8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7602 9996 bytes

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