Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f98d42923ea1530…

MALICIOUS

PDF

73.8 KB Created: 2020-08-14 01:45:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3e3f8efd50fd1edafa7d08dc902bce0 SHA-1: 4e3df04c69097d0e7945a940ad1073679e13cff4 SHA-256: 3f98d42923ea15303421cd6c6f1693aec0a234ff0d415c9fcedadcb661445fa9
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm pattern, with numerous external links, including one to 'cdn.shopify.com'. The document body, though heavily obfuscated, contains the same URL found in the redirector heuristic, suggesting it's the primary lure. The presence of urgency language further supports a phishing or social engineering attack vector.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.com/pify?keyword=idsa+guidelines+bacteremia+gram+positive
    • http://files.nextlearning.de/uploads/1/3/0/8/130873921/3355187.pdf
    • http://files.draiochtshoppe.com/uploads/1/3/1/0/131070982/dc3b2d3a69.pdf
    • http://files.joshklemons.com/uploads/1/3/2/7/132740595/sifozit_voroxowojeku_rulozu_wosakakuda.pdf
    • https://cdn.shopify.com/s/files/1/0431/7315/0869/files/license_express_washington.pdf
    • https://cdn.shopify.com/s/files/1/0439/3353/2315/files/candlestick_chart_patterns.pdf
    • https://cdn.shopify.com/s/files/1/0440/4166/6710/files/27233419935.pdf
    • https://cdn.shopify.com/s/files/1/0429/7054/6329/files/mathita_dvd_ram.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8212/files/ocr_plugin_for_wondershare_editor_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/5497/9477/files/sims_freeplay_cheats_iphone_2016.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/nagavenipabide.pdf
    • https://cdn.shopify.com/s/files/1/0431/1393/9101/files/dapetizebek.pdf
    • https://cdn.shopify.com/s/files/1/0431/3477/9553/files/kogubagujitu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1063/7475/files/10307728497.pdf
    • https://cdn.shopify.com/s/files/1/0431/4752/6305/files/44342193446.pdf
    • https://cdn.shopify.com/s/files/1/0431/2144/2965/files/medical_nanotechnology_and_nanomedicine.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_off0000e1c5.bin
e220ac851a88d9336768ea6088502d3c707287c0afc840d14eb6ceda804b5c8f
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C5 5528 bytes
font_01_sfnt_off0000f476.bin
c77ee7f851e4b827bda9852023a706dd8b64b357eec1f8a563dd5e3d942443b8
pdf-font-stream PDF embedded font (sfnt) at offset 0xF476 11488 bytes