Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3de53d5bcaa0ffb…

MALICIOUS

PDF

42.4 KB Created: 2020-08-11 09:02:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9dbc2f25e899c2dab27f95e018e57b8 SHA-1: a21f22bace64f818867fd8b61319372337e21248 SHA-256: c3de53d5bcaa0ffb3c0f8807b3784ae35b2f849ace130eaa69a7fc2e70ef01fe
150 Risk Score

Malware Insights

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

The PDF file contains numerous links, including one pointing to a known malicious redirector. The document body text, though partially corrupted, includes the phrase 'Exportar pdf para o excel' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of a link farm heuristic further indicates malicious intent to distribute content or redirect users.

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/wb?keyword=exportar%20pdf%20para%20o%20excel
    • http://mimok.saintmarkssilvis.org/uploads/1/3/1/8/131857631/823056.pdf
    • http://files.thepreregtrainingcompany.com/uploads/1/3/2/7/132710627/8635197.pdf
    • http://files.derksenlab.org/uploads/1/3/1/8/131871462/8479401.pdf
    • http://files.zayera.com/uploads/1/3/1/3/131379456/fdee456abb7.pdf
    • https://cdn.shopify.com/s/files/1/0431/4988/5606/files/93452771819.pdf
    • https://cdn.shopify.com/s/files/1/0440/6444/0472/files/marakisuwomusevesiwune.pdf
    • https://cdn.shopify.com/s/files/1/0433/6956/2266/files/referencias_bibliograficas_apa_sexta_edicion.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nemubowakupupoda.pdf
    • https://cdn.shopify.com/s/files/1/0432/8852/7006/files/destiny_vault_of_glass_armor.pdf
    • https://cdn.shopify.com/s/files/1/0440/9258/8184/files/zapumipumodowox.pdf
    • https://cdn.shopify.com/s/files/1/0429/2545/7575/files/10923013817.pdf
    • https://cdn.shopify.com/s/files/1/0429/8421/0583/files/47218157690.pdf
    • https://cdn.shopify.com/s/files/1/0434/4990/9415/files/zijov.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a10.bin
fd17433e8949768c3338e322951b18debc84ef4a643f5b6e48089c14f2805f08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A10 4996 bytes
font_01_sfnt_off00006b1b.bin
c58734b7c43f876d00250fe79027c28030c899bcb97b97a165465ed91b27eb93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B1B 2744 bytes
font_02_sfnt_off000076c5.bin
e8fb0cb56d56a32ec0c1b974bc763422a804e682f320091616235f344df45131		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76C5 11212 bytes

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