Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2851b5a5566aa37…

MALICIOUS

PDF

42.9 KB Created: 2020-08-22 19:30:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a301e705e52235afd4bb9eafc0b922d3 SHA-1: efaa5e27e79c9fe45818de44483f36da1ab055e7 SHA-256: d2851b5a5566aa37c2a364095fe99cf1e3445ef697a315d4431d41bc1a33d3e8
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=casio+edifice+558+manual', which is flagged as malicious. This suggests the PDF is designed to exploit users searching for manuals, redirecting them to malicious infrastructure.

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=casio+edifice+558+manual
    • http://zojejawox.animalcountryparadise.com/uploads/1/3/2/6/132681361/4505116.pdf
    • http://zedivabiz.tigertogre.com/uploads/1/3/0/7/130775062/e5412.pdf
    • http://files.eatwellhalifax.com/uploads/1/3/0/7/130775221/c7afdfa84992c20.pdf
    • https://cdn.shopify.com/s/files/1/0438/3899/6642/files/37517226073.pdf
    • https://cdn.shopify.com/s/files/1/0435/5470/1463/files/interrogative_adjectives_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0430/9316/4199/files/agama_itu_bukan_candu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2314/6906/files/84128816905.pdf
    • https://cdn.shopify.com/s/files/1/0438/4771/2928/files/api_platform_disable_swagger.pdf
    • https://cdn.shopify.com/s/files/1/0433/9820/1502/files/gegebirapoduniwulu.pdf
    • https://cdn.shopify.com/s/files/1/0435/6957/8147/files/semajudilufupugapukeniro.pdf
    • https://cdn.shopify.com/s/files/1/0429/8778/2297/files/auto_click_cookie_clicker.pdf
    • https://cdn.shopify.com/s/files/1/0430/7910/6724/files/gta_san_andreas_full_cheat_codes.pdf
    • https://cdn.shopify.com/s/files/1/0434/5724/9430/files/70071937817.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9236/files/51800768627.pdf
    • https://cdn.shopify.com/s/files/1/0437/2178/5498/files/40146158440.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_off00006265.bin
62696117ca609913e09b303dbcbd1f59fbd32e52823ad30d6a0e7ea9cffe2573		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6265 5296 bytes
font_01_sfnt_off00007459.bin
64cb61215e7c2886749b226309ec050722eef08b25f7f13771c20c4e0a10ce72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7459 13476 bytes

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