Malicious PDF — malware analysis report

Static analysis result for SHA-256 3540f1b2ec03c650…

MALICIOUS

PDF

44.7 KB Created: 2020-08-21 14:24:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6c5f523d4655cd625250b60a2c5b65c SHA-1: 5caa0f8de299f4e8704d476c9156a2062d76e7d5 SHA-256: 3540f1b2ec03c650a1c237ade21db753958b0fd2d39de10a38f1c7979c6791b6
154 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, pointing to `https://ttraff.cc/pify?keyword=guider+synonyme+mots+fl%25C3%25A9ch%25C3%25A9s`. Additionally, it exhibits a PDF link farm with numerous links to Shopify-hosted PDFs, suggesting a potential SEO manipulation or content distribution scheme. The ML classifier also strongly flagged this PDF as malicious.

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=guider+synonyme+mots+fl%25C3%25A9ch%25C3%25A9s
    • http://files.janellelannan.com/uploads/1/3/2/6/132681233/lanevubufup.pdf
    • https://cdn.shopify.com/s/files/1/0439/0774/3899/files/banach_alaoglu_theorem.pdf
    • https://cdn.shopify.com/s/files/1/0431/7013/6218/files/zuwotawekilebirog.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/6884047730.pdf
    • https://cdn.shopify.com/s/files/1/0435/1187/3688/files/dejaz.pdf
    • https://cdn.shopify.com/s/files/1/0439/2127/7096/files/cabazitaxel_package_insert.pdf
    • https://cdn.shopify.com/s/files/1/0428/8705/3471/files/powered_by_fractalum.pdf
    • https://cdn.shopify.com/s/files/1/0433/4934/4421/files/wasugiziwizidiwuzidikex.pdf
    • https://cdn.shopify.com/s/files/1/0440/0008/4126/files/nomenclatura_alcanos_alquenos_alquinos.pdf
    • https://cdn.shopify.com/s/files/1/0434/7743/4525/files/print_booklet_to_indesign.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_off00006524.bin
0d0f78bda066131dc48004c7fbe7d2b6636fd2a241bbeed805fdb735bae2c3df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6524 5328 bytes
font_01_sfnt_off000076d9.bin
9ea2c70db334d78235f1d99f3992cfab4df411a8df21854d4991dbe094b4b27f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76D9 15524 bytes

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