Malicious PDF — malware analysis report

Static analysis result for SHA-256 41ca1bca32a2f2ac…

MALICIOUS

PDF

55.9 KB Created: 2020-08-22 04:28:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b040db8f113b69fd557787973d73fa0c SHA-1: 3e1f2035305e937a45466ce077e7b3a62511d5d2 SHA-256: 41ca1bca32a2f2acf44a0cc8cc65b259542307710d5413073f9bee6df7c68970
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text suggesting a lure related to 'Gta heist crew guide' and includes the malicious URL. The PDF_SEO_LINK_FARM heuristic indicates a large number of embedded links, suggesting a link farm for SEO manipulation or to obscure the true destination. The ML_NYX_PDF_MALICIOUS classifier strongly supports the malicious nature of this PDF.

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=gta+heist+crew+guide
    • http://dutusizo.aubsblog.com/uploads/1/3/1/4/131438572/3650268.pdf
    • http://datutefuz.camphillvillage5k.org/uploads/1/3/0/7/130775918/zobixalixuteb.pdf
    • http://files.hawaiis1000friends.org/uploads/1/3/2/7/132710603/nigobivesaroze.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5023/files/kufirazip.pdf
    • https://cdn.shopify.com/s/files/1/0431/2432/6564/files/58633215843.pdf
    • https://cdn.shopify.com/s/files/1/0432/0873/6927/files/general_system_theory_definition.pdf
    • https://cdn.shopify.com/s/files/1/0435/4985/1811/files/xevadafafufe.pdf
    • https://cdn.shopify.com/s/files/1/0430/9997/9930/files/68209799830.pdf
    • https://cdn.shopify.com/s/files/1/0437/2961/7057/files/65211964836.pdf
    • https://cdn.shopify.com/s/files/1/0434/2582/4929/files/powered_by_4images_kommentar_posten.pdf
    • https://cdn.shopify.com/s/files/1/0432/4989/3531/files/mapa_aquitania.pdf
    • https://cdn.shopify.com/s/files/1/0431/0974/4789/files/80528466546.pdf
    • https://cdn.shopify.com/s/files/1/0427/5470/3526/files/isabel_de_los_rios_beyond_diet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/josuzafegeda.pdf
    • https://cdn.shopify.com/s/files/1/0430/6498/3703/files/54988015040.pdf
    • https://cdn.shopify.com/s/files/1/0450/4325/3406/files/us_history_books_for_high_school.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_off00009cc2.bin
d67f6ff27711e8d0730b4600c82f5a87a16bb690f093541d689b91a61d8b59e2
pdf-font-stream PDF embedded font (sfnt) at offset 0x9CC2 5292 bytes
font_01_sfnt_off0000aecc.bin
2a6f3a6ff3a6645ef61ffee4c1d6becec2ee2508caad3c84ba8a4dab752e4a8a
pdf-font-stream PDF embedded font (sfnt) at offset 0xAECC 10420 bytes