Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4d6c9b8307d141f…

MALICIOUS

PDF

57.1 KB Created: 2020-08-05 08:30:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0773be448f5e4e0a9d9f82c0f8d8265a SHA-1: e90d7693738440f5f54d8fbd6eed903c991d5e2f SHA-256: c4d6c9b8307d141ff99021d9e5827775523c5974326b6fb606b488d5b1e90fec
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm, embedding numerous external PDF links, many hosted on Shopify. The ML classifier strongly indicates maliciousness. The primary malicious IOC is the redirector URL, which likely serves as a gateway to further malicious content or phishing pages.

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.com/pify?keyword=le+spleen+de+paris+baudelaire+pdf
    • http://files.horizonsatwestminster.org/uploads/1/3/0/9/130970022/2010508.pdf
    • http://files.roejendradesigns.com/uploads/1/3/1/4/131406182/pixudekabaz.pdf
    • http://files.house-removals-surrey.info/uploads/1/3/1/6/131636916/9803063.pdf
    • https://cdn.shopify.com/s/files/1/0436/9442/4232/files/10056966613.pdf
    • https://cdn.shopify.com/s/files/1/0429/5933/9679/files/69594169545.pdf
    • https://cdn.shopify.com/s/files/1/0434/6318/0454/files/94702957988.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/witcher_3_ekimmara.pdf
    • https://cdn.shopify.com/s/files/1/0429/2047/6828/files/zifaledebuf.pdf
    • https://cdn.shopify.com/s/files/1/0432/8049/8841/files/44973733849.pdf
    • https://cdn.shopify.com/s/files/1/0431/7780/3931/files/17540027133.pdf
    • https://cdn.shopify.com/s/files/1/0428/3056/1447/files/logitech_f710_driver.pdf
    • https://cdn.shopify.com/s/files/1/0434/9070/5574/files/redejikew.pdf
    • https://cdn.shopify.com/s/files/1/0428/5677/5839/files/90339997622.pdf
    • https://cdn.shopify.com/s/files/1/0430/8706/9348/files/hp_universal_print_driver.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_off000090d8.bin
b168de3df2be8472aea5aea54a7691b7fa6156227aad3408dfefce42aabeb2ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90D8 4808 bytes
font_01_sfnt_off0000a121.bin
484c7e37d4fefc5c015bef38bd0e0fa16c7d9c4ae3e05538b9caaf21e27bae17		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA121 12336 bytes
font_02_sfnt_off0000c7e0.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7E0 4324 bytes

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