Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfe7530e5df9caf2…

MALICIOUS

PDF

43.8 KB Created: 2020-07-28 12:49:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9812ad39406047558747edf6683162e SHA-1: 6382404e5906ec93d316cd5a10839531baf6b0ca SHA-256: cfe7530e5df9caf204fdb77b29311684006e0b4c385b0929464a4680780258fb
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'ttraff.com', which is designed to lead users to further malicious content. The document also features a link farm of SEO-optimized PDFs hosted on Shopify, indicating an attempt to broaden reach and potentially mask malicious intent. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector and link farm attack pattern.

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=a+friend+like+me+piano+sheet+music
    • http://files.soundsfunny.net/uploads/1/3/0/9/130968956/risoporijuj_tovonopozi_pivafazida.pdf
    • http://files.icttg.com/uploads/1/3/0/7/130739183/9915664.pdf
    • http://files.sayyestothecake.com/uploads/1/3/2/7/132740778/tapavizer_wikos_zagiwujajiv.pdf
    • http://files.johnwestlakeods.com/uploads/1/3/2/6/132681482/nowimawewixibetu.pdf
    • http://files.sayyestothecake.com/uploads/1/3/2/7/132740778/tapavizer
    • https://cdn.shopify.com/s/files/1/0433/6808/7711/files/62557003549.pdf
    • https://cdn.shopify.com/s/files/1/0428/9236/1887/files/bozimudekazojozikovirivos.pdf
    • https://cdn.shopify.com/s/files/1/0429/4174/3263/files/dudekozor.pdf
    • https://cdn.shopify.com/s/files/1/0427/8062/3015/files/31755634265.pdf
    • https://cdn.shopify.com/s/files/1/0431/0342/0570/files/jemonipori.pdf
    • https://cdn.shopify.com/s/files/1/0438/6501/4437/files/gesitukoperumudedade.pdf
    • https://cdn.shopify.com/s/files/1/0430/6668/7642/files/lijumevir.pdf
    • https://cdn.shopify.com/s/files/1/0429/5213/0716/files/tijetufifesamizusu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0538/6657/files/ruzatajuburij.pdf
    • https://cdn.shopify.com/s/files/1/0435/2219/5608/files/farakalopofiruvuse.pdf
    • https://cdn.shopify.com/s/files/1/0432/5670/9288/files/67983293224.pdf
    • https://cdn.shopify.com/s/files/1/0434/5584/0422/files/95181644755.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_off00006c48.bin
5bd0291d49300bfcf93a7524361b97fbe661ef6d11cd2742a69f148ddb43e4c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C48 5332 bytes
font_01_sfnt_off00007e32.bin
cb9cb961f01c4bb2c8f098959f3cca7d4b859e4c106d0a6bba549b3d09b8c2c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E32 10468 bytes