Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5012faecf03ea23…

MALICIOUS

PDF

57.5 KB Created: 2020-08-29 02:45:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef3edf992b4e474105339725fbe3a9d7 SHA-1: 2e7a328d06e7079674019bb55a34a73ec2ef4cda SHA-256: e5012faecf03ea239a7f498a5ad806e3b6fb43168bad817755d0f503ab6f7d56
152 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The primary malicious URL, https://ttraff.ru/wix?keyword=between+past+and+future+pdf, is identified as a known malicious redirector. The document body, though heavily obfuscated, contains this URL, suggesting it's the intended lure. The ML classifier also strongly indicated maliciousness.

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.ru/wix?keyword=between+past+and+future+pdf
    • https://static.usrfiles.com/ugd/b8c837_a9906b6b907b42d09ab8c2ccd98626df.pdf
    • https://static.usrfiles.com/ugd/b8c837_b0aabbc553d042b99877955f06c725cc.pdf
    • https://static.usrfiles.com/ugd/b8c837_3d7decd2b1cc4cf390df266a4601fc14.pdf
    • https://static.usrfiles.com/ugd/b8c837_df685358f3244444b989f5a7620b5a96.pdf
    • https://cdn.shopify.com/s/files/1/0432/5569/3470/files/adventure_time_watch.pdf
    • https://cdn.shopify.com/s/files/1/0438/4001/2450/files/validity_formal_logic_definition.pdf
    • https://cdn.shopify.com/s/files/1/0440/1407/6069/files/regular_expression_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/1037/5325/files/bioconjugate_techniques_third_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/9072/2454/files/52431783448.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8311/files/xitunuvegupetubuwexemuv.pdf
    • https://static.usrfiles.com/ugd/b8c837_86d3e3027366436b80a3352bdbbf305f.pdf
    • https://static.usrfiles.com/ugd/b8c837_9d8712a69db94ae599076b4dc36ac962.pdf
    • https://static.usrfiles.com/ugd/b8c837_607cf5f478734dbaa885c6cc1aadfda5.pdf
    • https://static.usrfiles.com/ugd/b8c837_c91a8d6cd1764ee89fb98ba89efd4be0.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_off0000a515.bin
b2aa70161c86a41eedbca1c995b1bec54e6279ff1494780b9ffb96abbe2e006b
pdf-font-stream PDF embedded font (sfnt) at offset 0xA515 5144 bytes
font_01_sfnt_off0000b6b2.bin
6649c85867901623af4371fba6b44b158c0295775d1016fde1cc5f18a1947483
pdf-font-stream PDF embedded font (sfnt) at offset 0xB6B2 10040 bytes