Malicious PDF — malware analysis report

Static analysis result for SHA-256 932994f24775847d…

MALICIOUS

PDF

45.6 KB Created: 2020-08-30 02:27:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9b5a58b8addd28c5c7b7c0e320fc591 SHA-1: a68aee63762b0f34cf365b031a7e0b2dc33a3bc6 SHA-256: 932994f24775847d6640c4f328ba9a81b6a259ce433bf98e5eefce59ef076666
152 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.com/wix?keyword=propiedades+de+los+espacios+vectoriales', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL and appears to be a lure. The presence of numerous other PDF links suggests a link farm or SEO poisoning attempt to distribute malicious content. The ML classifier 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=propiedades+de+los+espacios+vectoriales
    • https://cdn.shopify.com/s/files/1/0435/8150/5695/files/monografia_meio_ambiente.pdf
    • https://cdn.shopify.com/s/files/1/0438/1710/7616/files/kezarojutekabagenisakake.pdf
    • https://cdn.shopify.com/s/files/1/0432/1571/6513/files/41719782162.pdf
    • https://static.usrfiles.com/ugd/ab0441_419ac40a9b8d4be89bded722ce748ba6.pdf
    • https://static.usrfiles.com/ugd/902d29_a4e3b4d2353944faaa2997d3f994d8e6.pdf
    • https://static.usrfiles.com/ugd/b8c837_d70c5c6f37024ce0901cfea14c0efcb7.pdf
    • https://static.usrfiles.com/ugd/b8c837_311c22bcd3a346988ed7ac3f2868541d.pdf
    • https://static.usrfiles.com/ugd/865d50_26059c7b1bb04f34a66166c5b7b38535.pdf
    • https://static.usrfiles.com/ugd/f0e51d_8d6de524fbd1401da505d89a09e211aa.pdf
    • https://static.usrfiles.com/ugd/b8c837_04040f7608d74a0495fb67801fd37b0b.pdf
    • https://static.usrfiles.com/ugd/b8c837_ff482b99a2044902bd9b5e8ca62e7d65.pdf
    • https://static.usrfiles.com/ugd/b8c837_782af9f86f0f42eb96f5965a607cb2f8.pdf
    • https://static.usrfiles.com/ugd/8b97dd_c404f235243a49149f857904180118b8.pdf
    • https://static.usrfiles.com/ugd/b8c837_25449e10606b4d90bb17b4753bd07f7f.pdf
    • https://static.usrfiles.com/ugd/5899d5_612b00336a06441a85715f66ba681dc4.pdf
    • https://static.usrfiles.com/ugd/b8c837_77c975ca356f4feab207798eb7a5a9c0.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/
    • https://static.usrfiles.com

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f7a.bin
0c822131cf7be7119cdd87316e64bb9adfd31982e8651e0ffc8335ed89705050
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F7A 5128 bytes
font_01_sfnt_off000080f7.bin
39c6236f3b5c0ab8a9cb9ae035e03c3805dec858eb719686d8e4fbaee6676946
pdf-font-stream PDF embedded font (sfnt) at offset 0x80F7 11920 bytes