Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3de173580c75b32…

MALICIOUS

PDF

35.0 KB Created: 2020-08-09 08:10:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 687b2f669672df32d33fca07a8739c6d SHA-1: f9e45ecb2b6de29df6ce597543563c5925405783 SHA-256: e3de173580c75b32129fbaa39b4235ab2937ea692089eca01501e54c3647de45
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL identified is ttraff.ru, which is used in conjunction with a keyword suggesting a lure for 'passive voice exercises pdf'. The document body, though heavily obfuscated, contains references to this malicious URL and other Shopify-hosted PDF links, likely intended to mask the malicious activity. No scripts were extracted, but the PDF structure and embedded links strongly suggest a phishing or redirection attack.

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=passive+voice+exercises+pdf+present+simple
    • http://files.futurewire.org/uploads/1/3/1/3/131380558/c6c2232afe32.pdf
    • http://files.bigthompsonuniservunit.com/uploads/1/3/1/6/131637308/sawonikifim.pdf
    • http://files.philiprodrigues.com/uploads/1/3/1/4/131454808/6264672.pdf
    • http://files.bestpickeddiets.com/uploads/1/3/1/6/131606465/1a697.pdf
    • http://rakopu.khulaoncloud.com/uploads/1/3/1/4/131483281/kezajezebut.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/48766824718.pdf
    • https://cdn.shopify.com/s/files/1/0434/1855/0439/files/south_african_constitution.pdf
    • https://cdn.shopify.com/s/files/1/0436/4979/4213/files/bipisuwurotume.pdf
    • https://cdn.shopify.com/s/files/1/0433/6241/8846/files/73283002881.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94229011204.pdf
    • https://cdn.shopify.com/s/files/1/0431/8976/4245/files/puseduleled.pdf
    • https://cdn.shopify.com/s/files/1/0431/4133/3147/files/penuxogedamatiz.pdf
    • https://cdn.shopify.com/s/files/1/0427/7560/9510/files/78510312256.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/muxajuvorupi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6423/7992/files/38185626064.pdf
    • https://cdn.shopify.com/s/files/1/0438/0144/4514/files/73538177855.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_off00004b1d.bin
ffeba66e44865cb480ae5480bf8ae4102fed96dde154562a2f5a2c78a4c6db3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B1D 5428 bytes
font_01_sfnt_off00005d87.bin
018d60e86673383d74af947bff3807dc0516fed38c53c12bdef22c62d293e4b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D87 9800 bytes

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