Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9798aba079e8151…

MALICIOUS

PDF

35.9 KB Created: 2020-08-03 04:32:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a60cd6abf2a04040f5ebdf61ae1cf4e9 SHA-1: d5297926ca24b66db8514fb600f8a2ae7735f10b SHA-256: b9798aba079e81518fb53cc3476c7c86bb3ada9466590baffb5783cb80e522e6
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to benign Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that leads to the redirector, suggesting a lure. The presence of a PDF link farm heuristic further indicates an attempt to obscure the malicious destination. No scripts were extracted, but the overall structure and link analysis point to a phishing or malware delivery attempt.

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.cc/pify?keyword=power+system+analysis+grainger+pdf
    • http://files.navigatelifetransitions.com/uploads/1/3/1/4/131454560/tukiripopuvapogil.pdf
    • http://files.valeriegriffinrece.com/uploads/1/3/1/3/131380604/483602e3de9a.pdf
    • http://files.littlemomentsbysarah.net/uploads/1/3/2/3/132302939/sabutexebobuxepu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1651/8806/files/webpack_4_sass.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87195604050.pdf
    • https://cdn.shopify.com/s/files/1/0432/8495/5300/files/99097095563.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/lojoxo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4744/3865/files/josux.pdf
    • https://cdn.shopify.com/s/files/1/0437/0409/0792/files/zazanowelalasa.pdf
    • https://cdn.shopify.com/s/files/1/0431/7056/2209/files/85078594879.pdf
    • https://cdn.shopify.com/s/files/1/0431/8845/3533/files/33225587458.pdf
    • https://cdn.shopify.com/s/files/1/0432/3377/1688/files/22469204961.pdf
    • https://cdn.shopify.com/s/files/1/0435/4405/1864/files/tapekitapujiwux.pdf
    • https://cdn.shopify.com/s/files/1/0430/7563/3306/files/79978394427.pdf
    • https://cdn.shopify.com/s/files/1/0427/9848/1564/files/negifezekokimugotirajo.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_off00004d39.bin
df6f153474b8dc56f802c47ee9a14fb3f1f6b5e57de19f57ea8ce4d086fa9b70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D39 5556 bytes
font_01_sfnt_off00006028.bin
852a115b405adf0140e5fa96ffb3ae8a1cab60b52dfa8d0ae3f1a358a1d498ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6028 10176 bytes

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