Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e6a9cb08fbe7bca…

MALICIOUS

PDF

34.5 KB Created: 2020-08-30 17:55:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7fbe53ab0e16413e733c306cdd364bf SHA-1: 3f82f6ffe4f738f245b2e018d89e6a3a212296d9 SHA-256: 7e6a9cb08fbe7bca96893e2cf08bcbfe0a37beee5fc83170b763e08fc56aa5f2
152 Risk Score

Malware Insights

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

The PDF contains a prominent link that directs users to a known malicious redirector. The document body, though heavily obfuscated, includes the target URL and appears to be a lure related to 'hedge funds'. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning attempt to drive traffic to the malicious redirector.

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.cc/wix?keyword=all+about+hedge+funds+jaeger+pdf
    • https://cdn.shopify.com/s/files/1/0429/7624/7967/files/fadolijomitozod.pdf
    • https://cdn.shopify.com/s/files/1/0438/5269/3669/files/rigiru.pdf
    • https://cdn.shopify.com/s/files/1/0428/4815/7859/files/vutoze.pdf
    • https://cdn.shopify.com/s/files/1/0438/0609/7570/files/nonobasixegiruxedeloxeb.pdf
    • https://cdn.shopify.com/s/files/1/0432/5477/5970/files/jegufebuxozupomovejeva.pdf
    • https://cdn.shopify.com/s/files/1/0429/1539/7788/files/adhoc_server_apk.pdf
    • https://cdn.shopify.com/s/files/1/0432/3019/9966/files/92580476077.pdf
    • https://cdn.shopify.com/s/files/1/0433/6913/6284/files/wekojadexonujavopivejalan.pdf
    • https://cdn.shopify.com/s/files/1/0434/6842/3334/files/66407053057.pdf
    • https://static.usrfiles.com/ugd/24853a_3b8de75082ef4f1c886ee0a7ff966454.pdf
    • https://static.usrfiles.com/ugd/b8c837_1abaf3a6c2874118b59002efce9736c7.pdf
    • https://static.usrfiles.com/ugd/857e61_b498a6049c4c4f8fb2251d62b74acbdb.pdf
    • https://static.usrfiles.com/ugd/1be480_b7a80eb4c9904a3bbbac1a6e4837b201.pdf
    • https://static.usrfiles.com/ugd/b8c837_34b50b827e3f437b9d9bbf6ab7b54bb4.pdf
    • https://static.usrfiles.com/ugd/6a22cb_3cc1a0843f1748b39b2ae5d1f61fffe5.pdf
    • https://static.usrfiles.com/ugd/b8c837_0992f025c53541fca04e5c472a853b50.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_off00004a44.bin
6f6acb195bc5df06f25d591496acdcde079862010c5804270bea271ca1d7b45d
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A44 5508 bytes
font_01_sfnt_off00005cf6.bin
b784269260320650c3f5c8edad40d529b8df0e83b3b7c5f007b52a4ba21cf43e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CF6 9380 bytes