Malicious PDF — malware analysis report

Static analysis result for SHA-256 7abf4027dd6e7a08…

MALICIOUS

PDF

41.0 KB Created: 2020-08-22 08:22:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 553d0750afa796462c50f238693a2076 SHA-1: 3be38ec1e67f81f772901042cb383dec3562c8b8 SHA-256: 7abf4027dd6e7a083993cc2fe2a6ea4c36bc46de08b09a0dca1d21cf15e6239f
128 Risk Score

Malware Insights

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

The PDF file contains a link farm and a specific malicious redirector URL, indicating a phishing or malware distribution attempt. The document body, though partially corrupted, contains text fragments like 'answer thank you card' and 'account will be terminated', suggesting a lure. The presence of numerous external PDF links, many hosted on Shopify, points to a link farm strategy to obscure the malicious redirector. The primary malicious IOC is the ttraff.cc redirector.

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.cc/pify?keyword=answer+thank+you+card
    • http://files.ijss-sn.com/uploads/1/3/2/6/132695668/xusawipubej.pdf
    • https://cdn.shopify.com/s/files/1/0429/3020/8924/files/wesakukobisi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9702/1854/files/fagadonofaverolex.pdf
    • https://cdn.shopify.com/s/files/1/0435/5181/7879/files/cheapest_android_phones_2019.pdf
    • https://cdn.shopify.com/s/files/1/0432/3698/2944/files/53177779951.pdf
    • https://cdn.shopify.com/s/files/1/0431/6132/1634/files/61475886511.pdf
    • https://cdn.shopify.com/s/files/1/0432/2479/3245/files/73940823861.pdf
    • https://cdn.shopify.com/s/files/1/0434/0393/5911/files/daketupatodote.pdf
    • https://cdn.shopify.com/s/files/1/0430/3601/6802/files/62146544584.pdf
    • https://cdn.shopify.com/s/files/1/0435/1026/8064/files/93834033980.pdf
    • https://cdn.shopify.com/s/files/1/0430/7179/9449/files/sap_fico_accounts_payable_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/4794/3330/files/blossoms_of_the_savannah_summary_download.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_off00006314.bin
4c6d133269e794dcd79ac19b1d082c51773e47d9f3adf8ad3ec5c8ae56b52bac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6314 5240 bytes
font_01_sfnt_off000074e9.bin
58d7e8cb36b30307591191316d751f86f2b689ffd5620ed3bdaa11ed74dd5e44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74E9 10208 bytes

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