Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9e0b889e59e04dc…

MALICIOUS

PDF

63.1 KB Created: 2020-08-07 21:47:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be815ca60eb525c4e92a0ceb14a8f826 SHA-1: f7317ce01d58c727aa6f8534fe1c58b3c5f4c397 SHA-256: c9e0b889e59e04dc32b2f0424515bf90b3f91eca42f92db82748df67a3e80613
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.cc/pify?keyword=r+statistical+software+pdf'. The document body, though heavily obfuscated, contains this same URL, indicating the primary intent is to redirect the user to malicious infrastructure. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=r+statistical+software+pdf
    • http://files.pouchlings.com/uploads/1/3/1/4/131406337/2c5e9d7d552.pdf
    • http://files.queenletiziastyle.com/uploads/1/3/0/8/130814430/jemawer.pdf
    • http://files.perrymaxwellsociety.com/uploads/1/3/0/9/130969761/1022161.pdf
    • http://files.midbeach.net/uploads/1/3/0/9/130969473/8f2420311fda1ae.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/begurutesuzuditi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4281/5643/files/jeloroduwafajikatisu.pdf
    • https://cdn.shopify.com/s/files/1/0438/7300/9819/files/76875065727.pdf
    • https://cdn.shopify.com/s/files/1/0433/4216/8218/files/approximation_for_bank_exam.pdf
    • https://cdn.shopify.com/s/files/1/0427/4513/5260/files/87002333535.pdf
    • https://cdn.shopify.com/s/files/1/0430/9454/0452/files/wekifojuwok.pdf
    • https://cdn.shopify.com/s/files/1/0432/9573/5976/files/fixed_assets_management_system.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/understanding_business_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/2729/1542/files/60081293569.pdf
    • https://cdn.shopify.com/s/files/1/0434/5944/4889/files/v_wason_accountancy_class_12_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0432/9324/5600/files/17758856778.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/1/0433/4216/8218/files/approximati

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b94e.bin
8e5340b285739c4a3ec1daedc7aff0506f78d0108394c7a2b19dfe9ed3461ae3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB94E 5248 bytes
font_01_sfnt_off0000cb4e.bin
5e47b52e73797d529b0615c887f80300101818aca94dad9067fac8ee6529a80d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB4E 10588 bytes

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