Malicious PDF — malware analysis report

Static analysis result for SHA-256 94971248849eea48…

MALICIOUS

PDF

44.7 KB Created: 2020-08-17 16:41:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3a80c5c872b7f23314fb10dea57bd29 SHA-1: 33f90a8fff0e09dee6c7febce18cf7726a08d33b SHA-256: 94971248849eea4811bcbf4eef9fa7b6f6139eebe4f70234f5a1448e76f5db13
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, forming a link farm. One of these links, 'https://ttraff.ru/pify?keyword=different+types+of+bearings+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other Shopify-hosted PDFs, suggesting a lure to a malicious site. No scripts were extracted, but the PDF structure and link farm indicate a phishing or redirection attempt.

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=different+types+of+bearings+pdf
    • http://files.eugenemontgomery.com/uploads/1/3/1/4/131438766/zesolabugilobe.pdf
    • http://files.uglybugaboo.com/uploads/1/3/0/9/130969061/wexenuzajovine.pdf
    • http://files.healingnl.com/uploads/1/3/1/0/131070526/5270969.pdf
    • http://files.martynsmondayclub.co.uk/uploads/1/3/0/7/130775310/9783779.pdf
    • https://cdn.shopify.com/s/files/1/0435/0525/4566/files/wijununutebulolabila.pdf
    • https://cdn.shopify.com/s/files/1/0432/3459/0878/files/cancer_de_estomago_en_colombia.pdf
    • https://cdn.shopify.com/s/files/1/0429/8955/1770/files/collins_mandarin_chinese_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0431/9667/8301/files/ledixogepuputimadigofepum.pdf
    • https://cdn.shopify.com/s/files/1/0437/7300/1889/files/84263264655.pdf
    • https://cdn.shopify.com/s/files/1/0439/9906/8318/files/94967508897.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xovigaza.pdf
    • https://cdn.shopify.com/s/files/1/0433/1329/9620/files/mawaxaligebififasuzib.pdf
    • https://cdn.shopify.com/s/files/1/0433/4790/2629/files/xijovaletikedujogasuza.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6654/files/53579859182.pdf
    • https://cdn.shopify.com/s/files/1/0433/6061/6599/files/49101543475.pdf
    • https://cdn.shopify.com/s/files/1/0429/5573/5199/files/soropupusoresokom.pdf
    • https://cdn.shopify.com/s/files/1/0450/6419/2150/files/82424143465.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_off00007279.bin
939946a153fbcbffa6415d3b669078acb11a5a87ef1ca5678c5c7f54c74f4d0d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7279 5416 bytes
font_01_sfnt_off000084f4.bin
5dcd280957c86f663d35bc17186bc01b63c19b115bb3192d9e1e33f607f828fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x84F4 9700 bytes