Malicious PDF — malware analysis report

Static analysis result for SHA-256 a614177da5e10474…

MALICIOUS

PDF

35.2 KB Created: 2020-08-21 09:54:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a228d78cb8757af4282e06092b199b3d SHA-1: 8b9e55014641b085f2881e46cb608457cfe8751a SHA-256: a614177da5e10474bd346f5cfbbc27732918b848768963b627a60452f1c179f4
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a puzzle book and the malicious URL, suggesting a lure. The presence of multiple Shopify links indicates a link farm used to obscure the final malicious destination. No scripts were extracted, limiting the analysis of direct execution capabilities.

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=the+american+sign+language+puzzle+book+answers
    • http://files.thelittleacorninmontgomery.com/uploads/1/3/0/8/130814466/powazizurow.pdf
    • http://files.raleighgardiner.com/uploads/1/3/1/4/131455636/6434764.pdf
    • http://kesowibub.phoenixlefae.com/uploads/1/3/2/6/132681579/d6e8b00e1f38.pdf
    • https://cdn.shopify.com/s/files/1/0437/8217/6917/files/11x17_isometric_graph_paper.pdf
    • https://cdn.shopify.com/s/files/1/0434/8366/0441/files/mexegineboxagivovawoduti.pdf
    • https://cdn.shopify.com/s/files/1/0431/2272/0922/files/85846997755.pdf
    • https://cdn.shopify.com/s/files/1/0431/9579/3557/files/brevet_pondichery_2020_sciences.pdf
    • https://cdn.shopify.com/s/files/1/0435/2186/7930/files/96850603659.pdf
    • https://cdn.shopify.com/s/files/1/0433/9862/7495/files/bticino_classe_300x13e.pdf
    • https://cdn.shopify.com/s/files/1/0429/4092/4063/files/pdfill_tools_11._0.pdf
    • https://cdn.shopify.com/s/files/1/0430/2451/5229/files/arithmetic_mathematics.pdf
    • https://cdn.shopify.com/s/files/1/0432/9390/0958/files/revevexubedusubonom.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_off00004a96.bin
9727a9d6b99a9b316c260bf7d599e496db9cc780baead516f69293951cade41c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A96 5640 bytes
font_01_sfnt_off00005db9.bin
546bd3c30cf49038cf737683e05f218bb6e7a083afc011d150479202306b1143		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB9 9956 bytes

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