Malicious PDF — malware analysis report

Static analysis result for SHA-256 b212ff425d4cfb26…

MALICIOUS

PDF

42.1 KB Created: 2020-08-31 05:05:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a951b6527980c3059d86fdc4fea34b0 SHA-1: 8d608f57ce6380ed07a204442ce2844bf7a082a1 SHA-256: b212ff425d4cfb26d957fdc76479901eaa3869d848efd8406c2881b6bdce9918
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one specifically 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 redirect users to malicious content, likely for phishing or malware delivery. The presence of numerous links to static.usrfiles.com, even if benign, contributes to a link farm strategy.

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/wix?keyword=gemini+man+stream+deutsch
    • https://static.usrfiles.com/ugd/bf07b1_d2c5203c755b4e8484d70e98e11c96a1.pdf
    • https://static.usrfiles.com/ugd/b8c837_0d73edd628ee4265a8e5469ac2b3166e.pdf
    • https://static.usrfiles.com/ugd/6846fe_fae24acb58ac4cd8b71f8a58bae0b381.pdf
    • https://static.usrfiles.com/ugd/726ec9_19bf0c228d4640d886077cbe8de7dd05.pdf
    • https://static.usrfiles.com/ugd/5ed537_144401b46c2348318277ac2234bad1e2.pdf
    • https://static.usrfiles.com/ugd/be19e1_b649b50f8a394eddb02c30267bb87135.pdf
    • https://static.usrfiles.com/ugd/b8c837_f51a4045a515473d84f23bf42b5d6aa6.pdf
    • https://static.usrfiles.com/ugd/7603ae_de025991e1374f44a480d6157d27c574.pdf
    • https://static.usrfiles.com/ugd/837d34_f8c2464a621c495f8d6c184975bfc28a.pdf
    • https://cdn.shopify.com/s/files/1/0437/7313/2954/files/13072658592.pdf
    • https://cdn.shopify.com/s/files/1/0430/8064/6807/files/fajorutiveruju.pdf
    • https://cdn.shopify.com/s/files/1/0430/1216/1685/files/audit_and_assurance_acca.pdf
    • https://cdn.shopify.com/s/files/1/0431/8806/0320/files/yuumi_garen_guide.pdf
    • https://cdn.shopify.com/s/files/1/0427/9821/9420/files/mercy_shawn_mendes_descargar.pdf
    • https://cdn.shopify.com/s/files/1/0434/6321/3209/files/46300344206.pdf
    • https://cdn.shopify.com/s/files/1/0436/0654/0445/files/extracorporeal_membrane_oxygenation_for_severe_acute_respiratory_distress_syndrome.pdf
    • https://cdn.shopify.com/s/files/1/0437/6638/2749/files/vector_candela_studio_9._1.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_off00005345.bin
4d7a1a34ee77d30c4854af1ff9ba2438571617726803e5ba0e02a7287417ba01
pdf-font-stream PDF embedded font (sfnt) at offset 0x5345 5176 bytes
font_01_sfnt_off000064a9.bin
8961c55370927bf2bfcefaf8ebd5a0ee6f91fa1033442927ff86ac9569634479
pdf-font-stream PDF embedded font (sfnt) at offset 0x64A9 9172 bytes
font_02_sfnt_off00007781.bin
d17d215c84c8778cb1fa4cb26e70a376208cb2bd75dad184af70118d165712b5
pdf-font-stream PDF embedded font (sfnt) at offset 0x7781 10476 bytes