Malicious PDF — malware analysis report

Static analysis result for SHA-256 46d77b1d5454173d…

MALICIOUS

PDF

56.2 KB Created: 2020-08-11 02:55:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9dfa508ed57b16e81844ab0d243fca88 SHA-1: d64b2dc4e0b801190d9554d703ccb4b86005abf9 SHA-256: 46d77b1d5454173d6cf5d6a5b84d342df2931da70a391c94be380372edd670c8
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a search result for 'anesthesia machine block diagram pdf'. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to various PDF files, likely for SEO manipulation or to host further malicious content. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of exploit or 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=anesthesia+machine+block+diagram+pdf
    • http://vamijuv.mercerscaffolding.com/uploads/1/3/2/6/132682137/jurowuwegu-kozipefe-vesakeroduji-jaxexitato.pdf
    • http://files.stantonacademy.com/uploads/1/3/2/6/132681949/4784992.pdf
    • http://files.pristinedetailingindy.com/uploads/1/3/1/0/131070612/6800907.pdf
    • https://cdn.shopify.com/s/files/1/0431/5404/7137/files/luwejokogud.pdf
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/agriculture_ecosystems_and_environment.pdf
    • https://cdn.shopify.com/s/files/1/0433/5042/5750/files/brew_install_specific_version.pdf
    • https://cdn.shopify.com/s/files/1/0433/6893/9672/files/mefamufufute.pdf
    • https://cdn.shopify.com/s/files/1/0430/8326/8263/files/kogamexufuwaditeriduv.pdf
    • https://cdn.shopify.com/s/files/1/0431/5817/5906/files/3240111492.pdf
    • https://cdn.shopify.com/s/files/1/0437/0097/7816/files/tisekegijiwedozutizopezug.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fovurasavelibegesixaga.pdf
    • https://cdn.shopify.com/s/files/1/0440/5598/6341/files/rafejurerawaduzujimupen.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66689816557.pdf
    • https://cdn.shopify.com/s/files/1/0438/6262/2358/files/21974772164.pdf
    • https://cdn.shopify.com/s/files/1/0437/2873/2314/files/zaposizer.pdf
    • https://cdn.shopify.com/s/files/1/0432/4127/5547/files/arkham_horror_card_game_rules_reference.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_off00009d80.bin
2ca3615f2108439f16c2b16a23405ba4fad076ae66ad49ebe627ba607c8e2b4c
pdf-font-stream PDF embedded font (sfnt) at offset 0x9D80 5760 bytes
font_01_sfnt_off0000b0e7.bin
71cab719d8c91664c7d5d3cd6e2113a167f4d810cfea25cdf03e36ecf2f57266
pdf-font-stream PDF embedded font (sfnt) at offset 0xB0E7 10072 bytes