Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d276f21cd7eede8…

MALICIOUS

PDF

44.3 KB Created: 2020-07-27 21:39:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3afcca9785f031018fc200e982f74bf SHA-1: 86c7c36b24619b18eef58d1a8d376ccb543bfc34 SHA-256: 4d276f21cd7eede8af7ee62a105586751be1b0a4b6d3a12ae61c667d2ad84d40
150 Risk Score

Malware Insights

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

The PDF contains a high density of external links, many pointing to Shopify domains, which is characteristic of a link farm designed to improve search engine rankings for malicious content. One of the primary links, 'https://ttraff.ru/pify?keyword=microsoft+word+certificate+template+free', is flagged as a malicious redirector, indicating an attempt to lead users to harmful sites. The ML classifier also strongly indicated maliciousness.

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.ru/pify?keyword=microsoft+word+certificate+template+free
    • http://files.buybendhomes.com/uploads/1/3/2/6/132681824/1978301.pdf
    • http://files.theatelierschool.com/uploads/1/3/2/6/132695572/xoxapisijuwupi.pdf
    • http://files.myworldofadventure.com/uploads/1/3/0/9/130969751/5709796.pdf
    • http://files.ecclestonpianoteacher.co.uk/uploads/1/3/1/0/131071256/fepokitidikuji_rewugibepuraw.pdf
    • https://cdn.shopify.com/s/files/1/0433/1008/8357/files/jopuxafisib.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/garul.pdf
    • https://cdn.shopify.com/s/files/1/0431/7007/0690/files/degodobadigev.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/36232609335.pdf
    • https://cdn.shopify.com/s/files/1/0431/7764/0093/files/54793634543.pdf
    • https://cdn.shopify.com/s/files/1/0433/3119/0952/files/buwinarowin.pdf
    • https://cdn.shopify.com/s/files/1/0431/1410/2951/files/xosigunavilu.pdf
    • https://cdn.shopify.com/s/files/1/0435/7967/0689/files/dudubuwefopoviwuverotari.pdf
    • https://cdn.shopify.com/s/files/1/0435/7881/8715/files/kimekafexes.pdf
    • https://cdn.shopify.com/s/files/1/0428/2620/3302/files/13529971807.pdf
    • https://cdn.shopify.com/s/files/1/0435/7079/0558/files/93363749561.pdf
    • https://cdn.shopify.com/s/files/1/0429/7873/8335/files/96249750677.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_off0000718a.bin
69435a810b744ec7ccb3951c363fb40c2d91b714560b13148de87054c012ae14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x718A 5080 bytes
font_01_sfnt_off000082df.bin
ea53b865be0e2e16c799c484c4a4bd6a23d9c9838258c020c69b36121acd23ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82DF 9692 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.