Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6b55a0d356edc99…

MALICIOUS

PDF

54.0 KB Created: 2020-08-29 22:25:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c838c578c44659774037f54f1b16fec SHA-1: ea18d8a980c89f65beb06ef96077374f7dd3311e SHA-256: a6b55a0d356edc99c70fca8ebe012139f669dbef67295e1c25a9f8ee92424510
154 Risk Score

Malware Insights

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

The PDF contains a link to 'ttraff.com' which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text referencing 'Star wars the fallen order', suggesting a lure to entice clicks. The PDF also hosts a large number of external links, many pointing to 'static.usrfiles.com', indicating a link farm strategy. No scripts were extracted, but the primary malicious activity appears to be redirection via the embedded URL.

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=star+wars+the+fallen+order
    • https://static.usrfiles.com/ugd/b8c837_8bc87731a82d48708873da3b9bc1b9ed.pdf
    • https://static.usrfiles.com/ugd/b8c837_854ccda3cc304d0586db2b2da9a270c3.pdf
    • https://static.usrfiles.com/ugd/b8c837_ca084c4f7b0541d7baabb864e8fe120d.pdf
    • https://static.usrfiles.com/ugd/b8c837_931200a67fff4940b176ef1a7a5e02f0.pdf
    • https://static.usrfiles.com/ugd/b8c837_e63ed30d3bb74fc4b721a7fc51224914.pdf
    • https://static.usrfiles.com/ugd/6116da_a099bfe4780a4d9aa14c0b9b2172e369.pdf
    • https://static.usrfiles.com/ugd/b8c837_de82ef8dd8774e5a86d629f3711181a5.pdf
    • https://static.usrfiles.com/ugd/b8c837_2fcfb1db18f843919c603408de94fb81.pdf
    • https://static.usrfiles.com/ugd/b8c837_4e2aacc39c9b4d2cb4a4ad025b9efbc1.pdf
    • https://static.usrfiles.com/ugd/b8c837_49427bf430254ac18ef2446caca64903.pdf
    • https://static.usrfiles.com/ugd/b8c837_a1ccccb3e0484a8fbc947a367d1542cd.pdf
    • https://static.usrfiles.com/ugd/269bb8_9f28631b597147f596ad9d99774a2958.pdf
    • https://static.usrfiles.com/ugd/b8c837_3694562c2f81490580e07062b122b439.pdf
    • https://static.usrfiles.com/ugd/b8c837_1c0b1f739eb242aa9231e83263d6eb70.pdf
    • https://static.usrfiles.com/ugd/b8c837_5f0e8922dfd942efa2013882555d4d27.pdf
    • https://static.usrfiles.com/ugd/b8c837_c8177ee939264312bc87960bd83c0ff5.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_off000094b0.bin
d6c864f232195b298c0a20603591b7ac43fe5602f6a144619f1176606b2592a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x94B0 5192 bytes
font_01_sfnt_off0000a658.bin
3476084de6ddf2c7628e0002f6d07009b49b78de62751b4300629fff803ca23f
pdf-font-stream PDF embedded font (sfnt) at offset 0xA658 10736 bytes