Malicious PDF — malware analysis report

Static analysis result for SHA-256 a34d0f336f8c2cb1…

MALICIOUS

PDF

55.1 KB Created: 2020-09-05 06:50:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae246dba24d3f50123234ebeb003f0c3 SHA-1: dc24eee83388ef80c8e102a16d82056398c41df0 SHA-256: a34d0f336f8c2cb1f9ec765c1be41688c3a9715971cb29f88b6a51f587c5116e
150 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, one of which is identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the primary intent is to lure the user to a malicious site, likely for phishing or malware delivery. The presence of numerous links, including a link farm, further supports this malicious intent.

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.me/wix?keyword=sistema+anaerobico+y+aerobico+pdf
    • https://static.u
    • https://cdn.shopify.com/s/files/1/0429/1140/0102/files/transformar_arquivo_de_autocad_em.pdf
    • https://cdn.shopify.com/s/files/1/0429/9030/5443/files/29111728012.pdf
    • https://cdn.shopify.com/s/files/1/0429/8034/3967/files/65782657832.pdf
    • https://cdn.shopify.com/s/files/1/0429/5763/5743/files/sotivadozaxinida.pdf
    • https://static.usrfiles.com/ugd/d94ae5_f51b57fa62334f589c7b94867c7c2c4c.pdf
    • https://static.usrfiles.com/ugd/9b7d8a_f47a605f405d4482adfd668eac929330.pdf
    • https://static.usrfiles.com/ugd/dad90e_d23187c66eb84f0699499b0f295d422b.pdf
    • https://static.usrfiles.com/ugd/15cd4d_dfdde25f506d4708b9c1675124f658d4.pdf
    • https://static.usrfiles.com/ugd/0e2875_5e6185be15814ed58b1759c2dacc6f53.pdf
    • https://static.usrfiles.com/ugd/b8c837_315e0bff97394a35989d9f9c21f5370a.pdf
    • https://static.usrfiles.com/ugd/b8c837_b89ff3ab74034586aba4ecea6fc3d600.pdf
    • https://static.usrfiles.com/ugd/d90490_f241b9cb7d05426fa22e195e8cbf76e8.pdf
    • https://static.usrfiles.com/ugd/99965f_984c0691a02d42e58bc387d576d3a719.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_off000094e6.bin
0c125ff8171a98971877e140a910728a795a84a28b622e7ceaacbaf8f4a273aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94E6 5616 bytes
font_01_sfnt_off0000a7eb.bin
8a96e1dd3f86fd3e4c8967a021c5b38a025fb1536787d33aaf9daa69928c8d28		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7EB 11592 bytes

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