Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff3590a2e59d72d7…

MALICIOUS

PDF

58.7 KB Created: 2020-08-12 03:20:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b32d7793b051ed7e7337c8befdc939a5 SHA-1: 39171ef4254af0ebfed795b60f3c95519030b970 SHA-256: ff3590a2e59d72d72b54f21ccaa00f6e311fe45bb31fb48aa4523fae24b3bed5
150 Risk Score

Malware Insights

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

The PDF contains numerous links, including a critical redirector link to 'ttraff.ru', suggesting a phishing or malware distribution lure disguised as academic notes. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted from this sample, but the embedded URLs are the primary indicators of malicious intent.

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=optics+and+atomic+structure+notes+pdf
    • http://files.cityskyflooring.com/uploads/1/3/1/4/131437484/8717682.pdf
    • http://tusutiro.pandamoniummartialarts.com/uploads/1/3/2/6/132681670/7291024.pdf
    • http://jawip.pigandink.com/uploads/1/3/0/7/130739169/nemulotovilon_gefewesu.pdf
    • http://files.techinfinityconsulting.com/uploads/1/3/1/1/131164350/xibuxefojaletuwiwu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1180/9190/files/after_effects_loop.pdf
    • https://cdn.shopify.com/s/files/1/0439/1780/3675/files/vulak.pdf
    • https://cdn.shopify.com/s/files/1/0437/8171/8173/files/85829649776.pdf
    • https://cdn.shopify.com/s/files/1/0432/8390/6724/files/76325515488.pdf
    • https://cdn.shopify.com/s/files/1/0434/0567/2597/files/25260593344.pdf
    • https://cdn.shopify.com/s/files/1/0432/7093/0600/files/cura_start_gcode.pdf
    • https://cdn.shopify.com/s/files/1/0431/2825/8726/files/83008691670.pdf
    • https://cdn.shopify.com/s/files/1/0436/7355/1001/files/consultative_hemostasis_and_thrombosis.pdf
    • https://cdn.shopify.com/s/files/1/0428/9586/8067/files/vuxusobenatuwa.pdf
    • https://cdn.shopify.com/s/files/1/0431/5702/9019/files/ponufixoponomanuzidebowip.pdf
    • https://cdn.shopify.com/s/files/1/0439/5037/5070/files/alination_philosophie.pdf
    • https://cdn.shopify.com/s/files/1/0430/9919/3501/files/xigesavukorigobumotaxadek.pdf
    • https://cdn.shopify.com/s/files/1/0438/2697/0786/files/cardiomegalia_tratamiento.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_off000087c4.bin
90761880041614d2ff9e01936cc4af32fca5583284b91e8a36fb4e01ec5d2f15
pdf-font-stream PDF embedded font (sfnt) at offset 0x87C4 5296 bytes
font_01_sfnt_off000099a6.bin
30c0382cacd570f0b1ae35f5545d9b0de251d5d7eab524c769abe7f257e94c23
pdf-font-stream PDF embedded font (sfnt) at offset 0x99A6 14132 bytes
font_02_sfnt_off0000c657.bin
58b8fabf0c28d5727e93fd3ffe5ddd4b88845b1de0e8ebc5eb3088ff6f4b845e
pdf-font-stream PDF embedded font (sfnt) at offset 0xC657 16192 bytes