Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ebec69b47d7f517…

MALICIOUS

PDF

42.0 KB Created: 2020-08-29 19:04:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4f5361344f5a75e205d5393ef184a00 SHA-1: fcbcc88cf448fb96a6bfab76d55e9097347ec8fe SHA-256: 7ebec69b47d7f517a99c6c14d02c1d9ece37e944d045a46065c0ba01eb8eb88e
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to a URL related to game cheats. This indicates a social engineering lure to entice users to click the link. The document body, though heavily obfuscated, contains the same malicious URL and several benign-looking PDF links, suggesting a link farm designed to obscure the primary malicious destination. The ML classifier also strongly flagged this PDF as malicious.

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.link/wix?keyword=cheat+gta+v+ps3+helicopter+bahasa+indonesia
    • https://static.usrfiles.com/ugd/b8c837_da30d6ebb71e486ba35eac40279845ff.pdf
    • https://static.usrfiles.com/ugd/0511f5_a4d1b5272f9046c083c48716ccf08cde.pdf
    • https://static.usrfiles.com/ugd/b8c837_6addfa1903ca4b7481afaf82ee466e43.pdf
    • https://static.usrfiles.com/ugd/d94ae5_f0bdcdb2eed04f6c8d77dfe426c991a8.pdf
    • https://cdn.shopify.com/s/files/1/0433/7529/6677/files/gibabe.pdf
    • https://static.usrfiles.com/ugd/097bd5_1bc7a4184c7942fdbd4cddda4b8c8bbe.pdf
    • https://static.usrfiles.com/ugd/b8c837_e715faea046f4d9eb43389ae93912a61.pdf
    • https://static.usrfiles.com/ugd/934fc3_bd76e5ef244b496aa50a12b10b32c08c.pdf
    • https://static.usrfiles.com/ugd/b8c837_c0812bb7e82e41c58e9700235dc98bac.pdf
    • https://static.usrfiles.com/ugd/b8c837_190d8abef2c64a88b1d03a9bea354686.pdf
    • https://static.usrfiles.com/ugd/b8c837_62ed7c86f51f40f9bb87f3ded3b0521a.pdf
    • https://static.usrfiles.com/ugd/b8c837_7a07edf9d9f64c18bb50311f113be05c.pdf
    • https://static.usrfiles.com/ugd/b8c837_41d13a3249a24646b06d8eedd46bd597.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_off00006436.bin
3d712550576fc3d8a0c48e65ba3124920963e653c20d62656c02724d09de4f23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6436 5604 bytes
font_01_sfnt_off00007738.bin
81a674469690e2654af9c56114e7486c5cd8643e9d8cbc09a1bcd241f50a2c01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7738 10496 bytes

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