Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2e7443ff3b2abea…

MALICIOUS

PDF

48.3 KB Created: 2020-08-09 21:39:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05fa7cbd657d7ca63d9e5eed50b1c6f8 SHA-1: e6d17aee2476e4d582100b163cf932097e3c47ae SHA-256: e2e7443ff3b2abea0ff80341cbd01db1d419065d0b04775dba7cbcc75b6624c7
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 designed to obscure the ultimate destination. The document also features a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic to increase visibility. The ML classifier strongly indicates maliciousness. No scripts were extracted, but the presence of the malicious redirector URL is the primary indicator of compromise.

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=algoritmo+de+la+division+primaria+pdf
    • http://files.johnzwoodworking.com/uploads/1/3/0/9/130969686/nejetanavew.pdf
    • http://files.mytangledstories.com/uploads/1/3/2/8/132815892/f5257b2a.pdf
    • http://files.negsbestthing.com/uploads/1/3/2/8/132815961/riwemuto.pdf
    • https://cdn.shopify.com/s/files/1/0429/6572/9429/files/fesivifuwepet.pdf
    • https://cdn.shopify.com/s/files/1/0435/3848/1311/files/electrical_ugly_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/66000663605.pdf
    • https://cdn.shopify.com/s/files/1/0431/0876/1764/files/dekomezamuba.pdf
    • https://cdn.shopify.com/s/files/1/0431/8117/9037/files/31780587540.pdf
    • https://cdn.shopify.com/s/files/1/0436/5107/2158/files/73330415024.pdf
    • https://cdn.shopify.com/s/files/1/0434/4892/6364/files/goresejusebexu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8558/4802/files/tusavaluginivomixuzo.pdf
    • https://cdn.shopify.com/s/files/1/0433/2060/6885/files/zagum.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0747/files/xozipuvexunodarofuxo.pdf
    • https://cdn.shopify.com/s/files/1/0429/7211/9199/files/fasefofevavepugaso.pdf
    • https://cdn.shopify.com/s/files/1/0434/3146/1016/files/sajunibojenedu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3427/2159/files/verivujukebotalunugogej.pdf
    • https://cdn.shopify.com/s/files/1/0438/7805/6091/files/musupuzunu.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_off0000639f.bin
d16568dcb92f48875ea08d4918d93e7bc9bf1808d5fc8eb3deaf435cd7704c98
pdf-font-stream PDF embedded font (sfnt) at offset 0x639F 5412 bytes
font_01_sfnt_off000075f6.bin
53ea64665c85c3bd983799fdbc3ef5c76f9eba07d4bf5e562b738a49ab6c60fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x75F6 12512 bytes
font_02_sfnt_off00009d41.bin
e334af804f3e65ae1542c988af1ad479365083c96d642c507abbcd042b79898e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9D41 16412 bytes