Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0f8b8838f491505…

MALICIOUS

PDF

39.6 KB Created: 2020-08-29 23:37:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 253085e7ffdca81b8121a3a05982bfe5 SHA-1: f727ed75c7caeaff437845f34f57006922718b9f SHA-256: f0f8b8838f491505ab5c0a6247426817dcf1fa281695fbe7ca1e146819ee5355
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF document contains a lure for "Gta v rockstar activation code" and embeds numerous links, including one to a known malicious redirector at ttraff.com. The ML classifier strongly indicated maliciousness. The document body itself is heavily obfuscated but contains the malicious URL, suggesting the primary goal is to redirect the user to a potentially harmful site.

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=gta+v+rockstar+activation+code
    • https://cdn.shopify.com/s/files/1/0428/2574/4547/files/xigeduvasejovufoz.pdf
    • https://cdn.shopify.com/s/files/1/0432/0375/6196/files/rubuxovubipuwebilutuzasu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6645/8265/files/62552547338.pdf
    • https://static.usrfiles.com/ugd/b8c837_d307585f8fdc43e7ab79e7c39acc6d58.pdf
    • https://static.usrfiles.com/ugd/b8c837_232f1ba59f154013bfdfcf99f5e48480.pdf
    • https://static.usrfiles.com/ugd/b8c837_83deba17ba46488e8e481a847c049795.pdf
    • https://static.usrfiles.com/ugd/b8c837_b67014d539ea4db3bcd7b30ca35ce6ec.pdf
    • https://cdn.shopify.com/s/files/1/0435/2779/8943/files/how_do_i_export_passwords_from_safari.pdf
    • https://cdn.shopify.com/s/files/1/0433/3902/2494/files/blue_hawk_tools.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31492874922.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_off00005d9e.bin
403d17d1f184620df9b3bb132dfe05780e2038b9f8d415bf64c83582002a9cb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D9E 5056 bytes
font_01_sfnt_off00006ee4.bin
4d73fbc0e5ea1ed3f1bc221eb8fc6a4a30795cb45b5ede1556dc3e954c0b198f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE4 10236 bytes

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