Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3e75978e4a00a48…

MALICIOUS

PDF

38.3 KB Created: 2020-09-04 00:01:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c4553e78083ef8bb1148c323fbd081e SHA-1: 2c881b74aa3017b8234513853591171617418c8e SHA-256: f3e75978e4a00a48aeb186929832710d2c4399a7dcf8ad8c21f48574422b15c3
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to malicious infrastructure. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm or SEO poisoning tactic to distribute the malicious PDF. No scripts were extracted, and the family is unknown.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=nursery+worksheets+evs
    • https://cdn.shopify.com/s/files/1/0428/9059/2422/files/5755036600.pdf
    • https://cdn.shopify.com/s/files/1/0437/4288/8097/files/bukhari_sharif_bangla_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/9612/1248/files/sikimukaf.pdf
    • https://cdn.shopify.com/s/files/1/0434/0452/5720/files/photograph_chords_nickelback.pdf
    • https://cdn.shopify.com/s/files/1/0434/7576/3353/files/2002_jeep_liberty_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/5922/4480/files/kaplan_step_2_ck_videos_2016.pdf
    • https://cdn.shopify.com/s/files/1/0439/5958/2878/files/aruba_ap_105_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/8298/1281/files/flight_of_the_bumblebee_trumpet_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0434/7019/2805/files/windows_host_file.pdf
    • https://static.usrfiles.com/ugd/48d9a1_9358e1bc11fb46f5915df13dd16b5f81.pdf
    • https://static.usrfiles.com/ugd/b4a829_0173a8b857844f5e803199d48620034d.pdf
    • https://static.usrfiles.com/ugd/e948c1_ebd0f34648d943129e23b614cbbc67d6.pdf
    • https://static.usrfiles.com/ugd/b8c837_39835e4bb17e4edfab816511a3ef0091.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_off00005ba9.bin
76fb3cd9c11ddcae7508305a816f5fd1bc4c273c6838fde100ccc571a805769b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BA9 4816 bytes
font_01_sfnt_off00006c23.bin
91f69f58d683c38e0698dbc55f3c540f4f31eb3c588c6f8df3fa28fe03aa5dc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C23 9584 bytes

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