Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7888b8d50463938…

MALICIOUS

PDF

42.1 KB Created: 2020-08-19 07:49:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d4731632d47d8f19161c537241d4b38 SHA-1: 3a3a3e8fd257ce5b90a44f48bcbf3da2570a443d SHA-256: f7888b8d504639381b405d0e1277effcb1c4a4ddda70965f5678ae15fd0e92ea
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL and text related to 'guide michelin etoiles bruxelles', suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify, likely to obscure the malicious destination. The primary malicious IOC is the redirector 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.cc/pify?keyword=guide+michelin+etoiles+bruxelles
    • http://files.herbaceouslyurban.com/uploads/1/3/1/3/131379951/kelotaxemu_wugubefabilesuj_zuwifo_bufosusaku.pdf
    • http://files.naturalicatchirhythms.co.uk/uploads/1/3/0/7/130775635/9313277.pdf
    • http://jepemuxo.readwritecenter.org/uploads/1/3/1/4/131437987/2b919a3d8.pdf
    • http://todevoxus.en.homecade.com/uploads/1/3/2/8/132814930/4671885.pdf
    • http://zupuwu.unorthodoxprize.org/uploads/1/3/1/8/131857920/tadomidu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5423/4785/files/bijadas.pdf
    • https://cdn.shopify.com/s/files/1/0451/5692/5594/files/discord_mod_application_template.pdf
    • https://cdn.shopify.com/s/files/1/0435/4146/3204/files/xuvulisawele.pdf
    • https://cdn.shopify.com/s/files/1/0427/6020/8540/files/uniden_6._0_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/2603/8433/files/cypress_hill_albums.pdf
    • https://cdn.shopify.com/s/files/1/0439/8232/3870/files/acquisition_of_language_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0434/6878/3768/files/sidofegipuzavazimurude.pdf
    • https://cdn.shopify.com/s/files/1/0438/0708/0608/files/jerizumubegudimuwi.pdf
    • https://cdn.shopify.com/s/files/1/0452/2138/0247/files/antony_and_cleopatra_summary_and_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0428/3983/4780/files/fexapagoja.pdf
    • https://cdn.shopify.com/s/files/1/0432/2862/7108/files/infarctus_msentrique.pdf
    • https://cdn.shopify.com/s/files/1/0433/7975/3121/files/7578292224.pdf
    • https://cdn.shopify.com/s/files/1/0432/2902/0317/files/75709200003.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_off000067ae.bin
5b2efad7367547b7d62760b558c0bd08df82f3ba090c0a4158af690fcd93af9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67AE 5208 bytes
font_01_sfnt_off0000793a.bin
537f8a9709a77e30ab62616ae3a2e6d5b55ed369cd954b8e172a473362f5e5aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x793A 10024 bytes

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