Malicious PDF — malware analysis report

Static analysis result for SHA-256 b39fa62f9e907f20…

MALICIOUS

PDF

42.8 KB Created: 2020-08-17 04:16:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0c8937dfd6bd49a0eb63d3ba56c5a44 SHA-1: c472579586dcb036b16e570fbed7abb44f1e18e1 SHA-256: b39fa62f9e907f2014599d71febbb512dc1708d687caefac51984e8f6afc8d4b
142 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to 'Sundaram BNP Paribas Mutual Fund Fact Sheet', suggesting a lure to disguise malicious intent. The presence of a callback phishing lure heuristic further supports the malicious nature of the document, indicating it may prompt users to call a fraudulent number.

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.ru/pify?keyword=sundaram+bnp+paribas+mutual+fund+fact+sheet
    • http://files.northernumpires.com/uploads/1/3/0/8/130814200/maridof.pdf
    • https://cdn.shopify.com/s/files/1/0437/0304/2216/files/pdf_to_word_nitro_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/7723/7913/files/22000401488.pdf
    • https://cdn.shopify.com/s/files/1/0430/5548/0981/files/nivedometejovudefanawure.pdf
    • https://cdn.shopify.com/s/files/1/0431/2301/5836/files/bebux.pdf
    • https://cdn.shopify.com/s/files/1/0430/6819/4978/files/51863514774.pdf
    • https://cdn.shopify.com/s/files/1/0431/1518/4277/files/genestealer_cult_codex_8th.pdf
    • https://cdn.shopify.com/s/files/1/0432/0513/2445/files/44029338343.pdf
    • https://cdn.shopify.com/s/files/1/0432/7328/9888/files/zepejegefolu.pdf
    • https://cdn.shopify.com/s/files/1/0439/2275/1643/files/49598808858.pdf
    • https://cdn.shopify.com/s/files/1/0431/9114/0510/files/62508818949.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005228.bin
9ad2cb43735dbfd5e49799ce2d1dccbcebbec44057cdcf8c967cf7a3a019e4d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5228 5636 bytes
font_01_sfnt_off00006519.bin
5ffab727e060283f67e14f943d826154dfcd1887c4fcebddabd647f41ea47709		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6519 10440 bytes
font_02_sfnt_off00008904.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8904 16164 bytes

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