Malicious PDF — malware analysis report

Static analysis result for SHA-256 39cff03e0f10ecb4…

MALICIOUS

PDF

33.5 KB Created: 2020-09-09 06:43:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9932357c9364100e6cffd25261e6e59 SHA-1: 759eb609cc1b325c0194b7b23876e4f49646e2dd SHA-256: 39cff03e0f10ecb4d0f096a1af44398b27cbce3262ad535ba88f8019472de172
140 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically `https://ttraff.me/wix?keyword=ccsd+sems+forms`. Additionally, it exhibits a PDF link farm pattern with numerous embedded URLs, many pointing to Shopify domains. The document body, though heavily obfuscated, contains text fragments related to 'ccsd sems forms' and the authoring application 'wkhtmltopdf', suggesting a lure to trick users into clicking the malicious link. The presence of a callback phishing lure heuristic further supports the social engineering aspect of this document.

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.
  • 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.me/wix?keyword=ccsd+sems+forms
    • https://static.usrfiles.com/ugd/89064d_53dd7f2c73e14146a378706e83b07780.pdf
    • https://static.usrfiles.com/ugd/4e6dd5_c0c6c262b1004d94a57c9ec9037b06f3.pdf
    • https://static.usrfiles.com/ugd/1e557c_478fc6f4e6054c3eb086349a3cbc0e92.pdf
    • https://static.usrfiles.com/ugd/bb13a2_d0a529e6d8ef45668b5107a40cb083fa.pdf
    • https://static.usrfiles.com/ugd/ac1638_44680057ae124c569ae3b63561085780.pdf
    • https://cdn.shopify.com/s/files/1/0430/9372/1255/files/ff12_zodiac_age_job_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/3153/5524/files/80965801913.pdf
    • https://cdn.shopify.com/s/files/1/0434/1992/6679/files/75156141297.pdf
    • https://cdn.shopify.com/s/files/1/0441/3269/6216/files/antonyms_worksheet_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/5664/4774/files/android_dictionary_app_source_code.pdf
    • https://cdn.shopify.com/s/files/1/0435/2809/3850/files/25184720926.pdf
    • https://cdn.shopify.com/s/files/1/0429/0838/5439/files/rokifatox.pdf
    • https://cdn.shopify.com/s/files/1/0437/1152/9114/files/46709889460.pdf
    • https://cdn.shopify.com/s/files/1/0437/7929/3338/files/juwitufegitago.pdf
    • https://cdn.shopify.com/s/files/1/0432/1820/6887/files/ashrafia_nisab.pdf
    • https://cdn.shopify.com/s/files/1/0436/2626/6782/files/cable_tray_installation.pdf
    • https://cdn.shopify.com/s/files/1/0432/3603/2680/files/gesedorames.pdf
    • https://cdn.shopify.com/s/files/1/0431/3622/1341/files/algae_classification_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/0830/8886/files/xbox_one_controller_bluetooth.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/
    • https://cdn.shopify.com/s/files/1/0440/0830/8886/files/x

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004962.bin
e3dc647b1f86c32779815fb732f6bfa46c4f1eae04057dd182409874d0e0b934		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4962 4828 bytes
font_01_sfnt_off000059b4.bin
32016160c62734a8e0e9c4909d005dcab8448fa95037890fe2a2242b3b79dc2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59B4 9292 bytes

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