Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c7660bd9ad9b407…

MALICIOUS

PDF

41.7 KB Created: 2020-08-11 15:43:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0742290fdf4ee022fc951f81d2645fe3 SHA-1: fa90ca3fc642354f8e88127a5b43baee2ebeb415 SHA-256: 2c7660bd9ad9b407f41b978f540e845c09731534df68d2d69c905101d1bb9483
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The ML classifier also assigned a high probability of maliciousness. The document body contains a URL that appears to be part of this link farm, leading to a potentially malicious redirector. The presence of numerous external links, many pointing to Shopify domains, suggests an attempt to obscure the ultimate destination and potentially distribute malware or conduct phishing.

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=alimentatie+sanatoasa+pdf
    • http://files.431775997417950473.com/uploads/1/3/0/7/130739525/weludab.pdf
    • http://mogalu.socialmediaflux.com/uploads/1/3/2/7/132740435/jadixes.pdf
    • http://files.ctbgbaskets.com/uploads/1/3/1/3/131379732/9844345.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/motorcycle_carburetor_parts_and_function.pdf
    • https://cdn.shopify.com/s/files/1/0432/4815/6835/files/online_conversion_doc_to.pdf
    • https://cdn.shopify.com/s/files/1/0436/4389/5966/files/76232012520.pdf
    • https://cdn.shopify.com/s/files/1/0432/1188/2653/files/71331321769.pdf
    • https://cdn.shopify.com/s/files/1/0430/9454/0452/files/loderimupup.pdf
    • https://cdn.shopify.com/s/files/1/0435/2478/4283/files/13604657325.pdf
    • https://cdn.shopify.com/s/files/1/0431/6109/2250/files/42189343884.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/93880590480.pdf
    • https://cdn.shopify.com/s/files/1/0434/2182/7222/files/pipuruvetebitenomu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3051/9716/files/17992363680.pdf
    • https://cdn.shopify.com/s/files/1/0432/4501/1112/files/laxewoxemateduluvuwuzus.pdf
    • https://cdn.shopify.com/s/files/1/0433/9433/4870/files/17828146607.pdf
    • https://cdn.shopify.com/s/files/1/0434/3853/8904/files/galuwa.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_off000064c2.bin
09e095472ebc61c295c2f8adea50a4166caff2d2ad212eaeae7c6ffe28e6c000		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64C2 5080 bytes
font_01_sfnt_off000075f3.bin
d7365d7f458464d4242ed364f52c918a1cb6b11437ea3a6274d1aa8750cfc3ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75F3 10644 bytes

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