Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e18d0b33766961e…

MALICIOUS

PDF

49.2 KB Created: 2020-08-09 04:09:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a364f187d0a17f2867cf53d440e8409b SHA-1: cad55af0b3fad5e8cd664eb07fe8b4a2e5284a00 SHA-256: 6e18d0b33766961e9d188e746901e01b21f15ac0c5e1d6ed878a9ffd2cab9bde
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one pointing to a known malicious redirector. The document body, though malformed, includes the URL 'https://ttraff.ru/pify?keyword=cricket+information+in+marathi+pdf+file+download', suggesting a lure to download further content. The ML classifier strongly indicates maliciousness, and the presence of a link farm heuristic further supports a malicious intent to redirect users.

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/pify?keyword=cricket+information+in+marathi+pdf+file+download
    • http://files.hermanus-festivals.com/uploads/1/3/1/3/131380951/4625890.pdf
    • http://files.stkjustlabskennel.com/uploads/1/3/0/8/130873975/baromegid_juxedivagun_jozelatafito_xuzikikar.pdf
    • http://files.jpipp.org/uploads/1/3/1/6/131606965/vutodetewezijo_silibotebobomo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1325/0965/files/55760173922.pdf
    • https://cdn.shopify.com/s/files/1/0438/2910/0701/files/45611934031.pdf
    • https://cdn.shopify.com/s/files/1/0436/5654/4409/files/1995_lexus_ls400_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/2611/2927/files/integrated_grammar_exercises_for_class_7.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/musigusuwekun.pdf
    • https://cdn.shopify.com/s/files/1/0439/0286/1464/files/peloduzukelotakak.pdf
    • https://cdn.shopify.com/s/files/1/0432/2331/8683/files/13925533715.pdf
    • https://cdn.shopify.com/s/files/1/0435/7508/3169/files/fivoreruwoka.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0497/files/dokek.pdf
    • https://cdn.shopify.com/s/files/1/0438/2218/6656/files/12698391205.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_off00008346.bin
1119a3d3fe17995023444182d1fa76ba65e558bc98139ba79ba80e7056bc6735
pdf-font-stream PDF embedded font (sfnt) at offset 0x8346 5280 bytes
font_01_sfnt_off00009522.bin
143f89389158f970a10410eace63f6bf04315ce46b426e31944bd6dc1b1cc3ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x9522 10192 bytes