Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb6ee9daf2cfa8aa…

MALICIOUS

PDF

34.0 KB Created: 2020-08-06 13:04:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93190d40345af98ac3bf79ae5e93f287 SHA-1: 6eeb1f94fae9d5709823b12fc5151d7ea323caf7 SHA-256: fb6ee9daf2cfa8aace045cdfd351e7cf5c8fafbeb24385564ffa39952d1ea881
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, a technique often used for SEO poisoning or redirecting users to malicious sites. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to SAT math and includes the URL https://ttraff.ru/pify?keyword=cracking+the+sat+math+1+subject+test+pdf, suggesting a lure to a potentially malicious site. No scripts were extracted from this sample.

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=cracking+the+sat+math+1+subject+test+pdf
    • http://files.ylrart.com/uploads/1/3/0/9/130969628/e9bfa4.pdf
    • http://files.tinagutierrezartsphotography.com/uploads/1/3/0/7/130775383/remax-taxopugazaledu-fuluxibejurifuj-lavosiraleset.pdf
    • http://files.romanhoering.com/uploads/1/3/1/4/131437648/69ef1bf27211dd.pdf
    • http://vifazes.jungw8.com/uploads/1/3/1/4/131454106/9833729.pdf
    • https://cdn.shopify.com/s/files/1/0432/6686/7362/files/luwegeno.pdf
    • https://cdn.shopify.com/s/files/1/0432/1578/2048/files/62380961687.pdf
    • https://cdn.shopify.com/s/files/1/0428/2230/3911/files/nilipukizoda.pdf
    • https://cdn.shopify.com/s/files/1/0436/0998/1085/files/xibatinina.pdf
    • https://cdn.shopify.com/s/files/1/0428/2338/5247/files/lobisuwesezerepif.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90841244024.pdf
    • https://cdn.shopify.com/s/files/1/0439/5093/2123/files/82838014229.pdf
    • https://cdn.shopify.com/s/files/1/0431/3242/0250/files/dyson_dc17_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/6341/9815/files/mugexejodagisimux.pdf
    • https://cdn.shopify.com/s/files/1/0430/6593/3985/files/96656866122.pdf
    • https://cdn.shopify.com/s/files/1/0429/3709/0211/files/dolokinazubewutig.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_off00004658.bin
f20f678725b974d1a89d8017e341cca4b636d42f2b8d9a77d1cc7317a341fbbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4658 5772 bytes
font_01_sfnt_off000059dc.bin
f751be2c39739394d2698a1f1fb79c1c6cde0110c01382595b0bd24807831d43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59DC 9728 bytes

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