Malicious PDF — malware analysis report

Static analysis result for SHA-256 d294170e9c985999…

MALICIOUS

PDF

45.2 KB Created: 2020-08-08 17:21:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b556301582135898974b1951a61bc93 SHA-1: 1a725de65e43541899581ac35643989f417b0f33 SHA-256: d294170e9c98599911a3813f8a66b3068319fa31970d33c256785e1520e78229
152 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify domains hosting PDF files. One prominent link, 'https://ttraff.cc/pify?keyword=peter+pan+book+pdf+download', is identified as a malicious redirector. This suggests the document's primary purpose is to redirect users to potentially harmful content, likely a phishing or malware distribution site, under the guise of providing a 'Peter Pan book pdf download'. The ML classifier strongly supports the malicious nature of this PDF.

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=peter+pan+book+pdf+download
    • http://files.edinburghtabletennis.com/uploads/1/3/1/8/131871778/xapogexipakesiris.pdf
    • http://files.amirjaima.com/uploads/1/3/2/7/132712214/9617276.pdf
    • http://files.hionfi.com/uploads/1/3/0/7/130775734/majoridojoboxeniraj.pdf
    • http://files.lilybites.com/uploads/1/3/1/4/131408142/xatirikusu_fusodavevarek.pdf
    • https://cdn.shopify.com/s/files/1/0438/9198/2491/files/foxag.pdf
    • https://cdn.shopify.com/s/files/1/0435/9582/5320/files/topic_about_afghanistan_history.pdf
    • https://cdn.shopify.com/s/files/1/0428/7417/5644/files/78314755887.pdf
    • https://cdn.shopify.com/s/files/1/0435/2396/5079/files/66239614831.pdf
    • https://cdn.shopify.com/s/files/1/0440/3278/6597/files/ad_hoc_network_applications.pdf
    • https://cdn.shopify.com/s/files/1/0433/6612/1623/files/anything_for_you_mam_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/3147/7922/files/51398429315.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/8835174884.pdf
    • https://cdn.shopify.com/s/files/1/0433/0674/6011/files/number_format_php.pdf
    • https://cdn.shopify.com/s/files/1/0434/3024/8600/files/temperament_traits.pdf
    • https://cdn.shopify.com/s/files/1/0427/8022/9791/files/38870509186.pdf
    • https://cdn.shopify.com/s/files/1/0437/7945/7173/files/how_to_use_although_in_a_sentence_correctly.pdf
    • https://cdn.shopify.com/s/files/1/0429/5573/5203/files/burepawafanixe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fd7.bin
81ef573096e122f3324fd000ee8e55527b9203255b667eb46770818865f5334e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD7 4896 bytes
font_01_sfnt_off0000708f.bin
16210b0e57d61df444cba496a7ce9d35980813b9d33ba11a86b517f0d246c56a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x708F 15644 bytes
font_02_sfnt_off00009a00.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A00 4324 bytes

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