Malicious PDF — malware analysis report

Static analysis result for SHA-256 696dbb355154c1e8…

MALICIOUS

PDF

41.2 KB Created: 2020-08-30 13:37:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1db5ac236bb1abd9ca3551f37d52755 SHA-1: 726f5f426fc868b45036b024c467ffc5cb3ada17 SHA-256: 696dbb355154c1e8c40bd0c9cea2a54f4b61b70d44ecbc9d32bfc8a6c32447e8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary redirector URL is https://ttraff.cc/wix?keyword=bi%2525C3%2525A7imce+olumlu+anlamca+olumsuz, which is known to host malicious content. This suggests the document is part of a link farm designed to distribute malware or phishing content. No scripts were extracted, but the presence of embedded URLs and the ML classifier's high confidence indicate malicious intent.

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=bi%2525C3%2525A7imce+olumlu+anlamca+olumsuz
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_822f31ee723b42e396225a7d915ab1c8.pdf
    • https://static.usrfiles.com/ugd/6cfc61_d0f4553549654230a387d0efbb523632.pdf
    • https://static.usrfiles.com/ugd/9421c8_df7c703219e744cf91a3ff4eb4e569b2.pdf
    • https://static.usrfiles.com/ugd/0c41e7_e5ae0d90b53744d08093626f7d97abf5.pdf
    • https://static.usrfiles.com/ugd/544c7e_ba3f17f480aa4d66a435511824b54ba7.pdf
    • https://static.usrfiles.com/ugd/b8c837_8858d9293e914f639ef3c5e852b4a3c4.pdf
    • https://static.usrfiles.com/ugd/b8c837_06a290a14c7b4918819c938994945933.pdf
    • https://static.usrfiles.com/ugd/b8c837_676b10df6a5a49e8b9d0f0192a7b4ade.pdf
    • https://static.usrfiles.com/ugd/b8c837_ef16bf6952514265933879bf8fcdf556.pdf
    • https://static.usrfiles.com/ugd/b8c837_3e2e55e826c147e89ea81c4fdd77ff3e.pdf
    • https://cdn.shopify.com/s/files/1/0431/7554/2950/files/santa_biblia_reina_valera_1960_descargar.pdf
    • https://cdn.shopify.com/s/files/1/0437/5638/8510/files/kojumuwiniwonevud.pdf
    • https://cdn.shopify.com/s/files/1/0432/5956/0086/files/12920934895.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f73.bin
d0bf4172807a2449f9a3aa88daa9039ca228100321f59f03c194d3cb683478ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F73 5128 bytes
font_01_sfnt_off0000708b.bin
c8e95fb9d25c3da9e44134f8c6c1fe0904e0a96ab9689958ff61b38ee54770a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x708B 12164 bytes