Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d686a8ff908ba0a…

MALICIOUS

PDF

35.3 KB Created: 2020-08-08 19:38:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04920552f1f02e814a6215d99ce04990 SHA-1: 8dc9810e30a33005e19f9679cdecf2e364ee9aef SHA-256: 3d686a8ff908ba0a52ede95ea201c5666aacfdb78ab9aea267c72cd459dc87ec
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to domains associated with link farms and redirectors. The primary malicious link, 'https://ttraff.cc/pify?keyword=autocad+plan+pdf+download', is designed to lure users with the promise of AutoCAD plans but redirects to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, but the PDF structure and embedded links indicate a social engineering attempt to redirect users to malicious content.

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=autocad+plan+pdf+download
    • http://tererozog.dakeiteasy.com/uploads/1/3/1/8/131856917/8784239.pdf
    • http://files.scupstateparalegals.org/uploads/1/3/0/8/130814124/sexokuvisito.pdf
    • http://gisogagi.womenofwpg.com/uploads/1/3/0/7/130738614/jafavesumuvi-vizis-dixogelolog-votasigol.pdf
    • http://files.morethanmydisability.com/uploads/1/3/2/6/132681771/vebaromuluv.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84574839703.pdf
    • https://cdn.shopify.com/s/files/1/0432/2259/7796/files/sajado.pdf
    • https://cdn.shopify.com/s/files/1/0429/5147/5351/files/mamagaxugujowibefozezib.pdf
    • https://cdn.shopify.com/s/files/1/0434/8300/5078/files/mopazofonijijegokalemukov.pdf
    • https://cdn.shopify.com/s/files/1/0430/6377/1293/files/94051621641.pdf
    • https://cdn.shopify.com/s/files/1/0451/1285/2632/files/bls_training_2020.pdf
    • https://cdn.shopify.com/s/files/1/0438/4037/2896/files/candide_magyar.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/agroforestry_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/6773/4176/files/64163032136.pdf
    • https://cdn.shopify.com/s/files/1/0434/0049/5260/files/60522278274.pdf
    • https://cdn.shopify.com/s/files/1/0431/3694/2234/files/48171571487.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_off00004c55.bin
569e5c2ecc94921feaee4ec45778174e520db58dcaab725df5940336a9e151b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C55 4956 bytes
font_01_sfnt_off00005d61.bin
b1eafaf5f78d498359973c0ef357fd648253574ecf8583fcfd0505fd0dfb47d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D61 10288 bytes

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