Malicious PDF — malware analysis report

Static analysis result for SHA-256 072182fb04a99404…

MALICIOUS

PDF

48.7 KB Created: 2020-08-31 06:32:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ba7b00445f9e22306dde21e4c3e34b5 SHA-1: 3da389dabe5fc2c5c152c4360a8e391c29391ce4 SHA-256: 072182fb04a994042e084566f0596ab503dfd7920d53ccc923e68475d140d35b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One of the primary links directs to a known malicious redirector, indicating an attempt to lead the user to harmful content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.com/wix?keyword=la+vida+de+pi+pelicula+completa+en+e
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/4948/3420/files/3d_model_porn.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/76106621034.pdf
    • https://cdn.shopify.com/s/files/1/0431/0158/5570/files/4898595913.pdf
    • https://cdn.shopify.com/s/files/1/0437/0877/6599/files/color_matters_branding_identity.pdf
    • https://static.usrfiles.com/ugd/d775a9_c928eb60e34245029c5d510195988065.pdf
    • https://static.usrfiles.com/ugd/b8c837_3c29623315d34921a674195d9875160d.pdf
    • https://static.usrfiles.com/ugd/b8c837_06f3629ff1844fcb9a9f43b560af8846.pdf
    • https://static.usrfiles.com/ugd/b8c837_58920cc15e0a48b4b9f9f191845df1f3.pdf
    • https://static.usrfiles.com/ugd/bfbc46_a25b28d0daf948ce9d921e754c668ecc.pdf
    • https://static.usrfiles.com/ugd/b8c837_616489f646b44c4f97f250f1b4d87860.pdf
    • https://static.usrfiles.com/ugd/dc51bb_96daa67356ac4e5ba043bbbcb9c89670.pdf
    • https://static.usrfiles.com/ugd/234f58_34bfc22acf9249e3b0923ccf99e85a6a.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fcb.bin
4df8628027656655ee33251d9a861a1f1d245400237f86d621a350276ea72fa1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FCB 4944 bytes
font_01_sfnt_off00007089.bin
822cb4de03b9b0d48118716a80624ba5b95c46e1ea735b5fcf8b4688c521b800		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7089 2404 bytes
font_02_sfnt_off00007ad3.bin
5c66e969840dfb867b640bdfed3e520028251e1997ff12b64783c2cc684b646f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD3 11072 bytes
font_03_sfnt_off00009f37.bin
ceedc92c1543be44c01fa5e43ba114d3ff30d3892c5aaa1c38e8edb21109d2cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F37 16588 bytes

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