Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fad9c7f99f6a991…

MALICIOUS

PDF

42.3 KB Created: 2020-08-29 22:29:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67db1728b88b4f024cd365d9ae9681e0 SHA-1: 3bfcd6891b65c36681e12f354082a42f073608a8 SHA-256: 8fad9c7f99f6a991c40d354e50762ef127b40cd664b745461405c4f0308f0d3e
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a lure related to payment redirection and bank details, consistent with business email compromise tactics. It includes a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc', which is designed to lead users to potentially malicious content. Additionally, the document exhibits characteristics of a link farm, embedding numerous URLs, many of which point to benign Shopify-hosted PDFs, likely as a camouflage technique. The presence of a callback lure further suggests a social engineering attempt.

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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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/wix?keyword=capital+one+deposit+slip+pdf
    • https://cdn.shopify.com/s/files/1/0433/4852/5208/files/totazowefematuzisusubew.pdf
    • https://cdn.shopify.com/s/files/1/0438/2785/5522/files/53390799318.pdf
    • https://cdn.shopify.com/s/files/1/0461/9026/4478/files/desoduxo.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9079/files/desufomanorixewusezudo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3121/5780/files/72744158881.pdf
    • https://cdn.shopify.com/s/files/1/0431/7354/4093/files/arcotech_ltd_annual_report.pdf
    • https://cdn.shopify.com/s/files/1/0432/7827/0628/files/44000474145.pdf
    • https://cdn.shopify.com/s/files/1/0434/0767/1447/files/application_letter_template.pdf
    • https://cdn.shopify.com/s/files/1/0430/3467/3301/files/77673469986.pdf
    • https://cdn.shopify.com/s/files/1/0436/4835/2406/files/gta_5_cheats_pc.pdf
    • https://cdn.shopify.com/s/files/1/0437/9151/5805/files/define_economic_growth.pdf
    • https://cdn.shopify.com/s/files/1/0430/4361/8969/files/52573148591.pdf
    • https://cdn.shopify.com/s/files/1/0433/4164/3928/files/7821988635.pdf
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/net_framework_3._51_windows_xp.pdf
    • https://cdn.shopify.com/s/files/1/0431/7983/5547/files/base64_to_image_c.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_off00006825.bin
79e656333b8ffd9b08cdd366e9a116b9db4b00cbeea843b3146addf76d8ba848
pdf-font-stream PDF embedded font (sfnt) at offset 0x6825 4844 bytes
font_01_sfnt_off000078b0.bin
124af0baa4cc6cbdc7f154e33df4d0d9d4f709e5ab3f1b2f945b9f6140d111f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x78B0 10520 bytes