Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ee7d62dd8d42bf3…

MALICIOUS

PDF

41.2 KB Created: 2020-08-24 15:16:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad941b647bb3d25b92d923ca915aa9ec SHA-1: 04fd80ddac3ebe9cbc0bc0e07faef60d17a3532f SHA-256: 2ee7d62dd8d42bf32193d753a4c7584a7ccd2f183e7b6aa9bd3313a027a78af7
128 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to Shopify domains hosting PDF files, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=comment+fusionner+des+pdf+adobe+reader'. The document body, though heavily obfuscated, also contains this URL, reinforcing its role as a lure. The presence of a 'download button' heuristic further supports the social engineering aspect of this attack.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=comment+fusionner+des+pdf+adobe+reader
    • http://files.barnonthecreekfarm.com/uploads/1/3/0/9/130969489/6248354.pdf
    • http://files.prakrutischool.in/uploads/1/3/0/8/130874683/gafivilifajibowikovi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1673/2315/files/3207307306.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/93158622210.pdf
    • https://cdn.shopify.com/s/files/1/0431/3510/7233/files/5922469748.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3581/files/xivuxolarunof.pdf
    • https://cdn.shopify.com/s/files/1/0430/9785/0010/files/kundli_software_for_mac.pdf
    • https://cdn.shopify.com/s/files/1/0434/1828/8277/files/gavikozurefila.pdf
    • https://cdn.shopify.com/s/files/1/0430/6393/5129/files/99634200244.pdf
    • https://cdn.shopify.com/s/files/1/0430/9454/0439/files/33483684012.pdf
    • https://cdn.shopify.com/s/files/1/0432/4678/0566/files/43350513134.pdf
    • https://cdn.shopify.com/s/files/1/0437/4318/2999/files/biochemistry_questions_and_answers_on_carbohydrates.pdf
    • https://cdn.shopify.com/s/files/1/0439/2553/6936/files/address_format_comma_after_state.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_off00006148.bin
1feff9da2d1001e38c15fd159a95086ac09f83db759ed65483ab609b56360ce5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6148 5200 bytes
font_01_sfnt_off000072ce.bin
98ebaaddf929afb6d03ce8c2df84e5d2e3c223f6321a5407df7f52fb0567c800		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72CE 11188 bytes

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