Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb63a5e222f8348f…

MALICIOUS

PDF

47.3 KB Created: 2020-08-03 17:33:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d033f0bb6a7623be349d0dccde50b33 SHA-1: 5559b564ed075d283bafd9b4083ac16d65a8cb73 SHA-256: cb63a5e222f8348f5fff7df747b2e71e984ab173b3cba62e1e3b71e01385b078
168 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically pointing to a known malicious redirector. The document body and heuristics indicate a lure related to payment processing and invoices, a common tactic for business email compromise. The presence of numerous links to external PDFs, many hosted on Shopify, suggests an attempt to obscure the final malicious destination and potentially engage in SEO poisoning to increase reach.

Heuristics 5

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.cc/pify?keyword=accounts+payable+invoice+processing+pdf
    • http://files.abcservicesllc.com/uploads/1/3/0/9/130969045/9558742.pdf
    • http://files.upstartglobalenterprises.com/uploads/1/3/0/8/130874175/d6c94.pdf
    • http://files.himalayanadventures.net/uploads/1/3/2/6/132681880/4915522.pdf
    • http://files.shorwellnetball.com/uploads/1/3/2/6/132681556/2092439.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kilezibuvi.pdf
    • https://cdn.shopify.com/s/files/1/0435/1819/7912/files/52048256523.pdf
    • https://cdn.shopify.com/s/files/1/0432/0090/5380/files/zaxipuxamipemavurum.pdf
    • https://cdn.shopify.com/s/files/1/0427/9389/4044/files/daxaxajom.pdf
    • https://cdn.shopify.com/s/files/1/0431/9979/1268/files/6528340550.pdf
    • https://cdn.shopify.com/s/files/1/0427/5198/3783/files/87132340383.pdf
    • https://cdn.shopify.com/s/files/1/0430/2818/5239/files/maresobimukaferemu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pujofupokutesigitugut.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/ty_beanie_baby_pricing_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/8339/1395/files/wezumudidapazarefuvajej.pdf
    • https://cdn.shopify.com/s/files/1/0430/1206/3391/files/suwoli.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_off00007981.bin
0c860e362f726c66343da2acfd95ed528d680ea33ec99c50e72bbbd37c8bbfd9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7981 5616 bytes
font_01_sfnt_off00008cbb.bin
f3d579e6ce1c83bced6b8e8e128afbf1b0c8c6b16656b6199247e5c307863317
pdf-font-stream PDF embedded font (sfnt) at offset 0x8CBB 10400 bytes