Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eaaf25a249b0183…

MALICIOUS

PDF

79.5 KB Created: 2020-09-14 22:15:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99379525d1448809441f9e8ca03b9500 SHA-1: 5e013f681e216ab1e80e300142cf0f1dc63b88ea SHA-256: 8eaaf25a249b0183edd7dfb2d0fbe2dfc50ebdf22397eea3f2bcaada74d218f2
150 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector to malicious infrastructure, indicated by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics. The document body, though heavily obfuscated, contains the text 'Rmoms locations near me' and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier also strongly flagged this PDF as malicious.

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=rmoms+locations+near+me
    • https://cdn.shopify.com/s/files/1/0437/8230/8002/files/consumer_reporting_agency_opt_out.pdf
    • https://cdn.shopify.com/s/files/1/0431/3484/5079/files/75025608499.pdf
    • https://cdn.shopify.com/s/files/1/0429/5432/6179/files/13299493113.pdf
    • https://cdn.shopify.com/s/files/1/0437/2326/0058/files/konuxiwadugokexewa.pdf
    • https://cdn.shopify.com/s/files/1/0432/6840/7464/files/clubbers_guide_2003.pdf
    • https://static.usrfiles.com/ugd/3eb4bd_943602fb95d441d38ee36221e7b1e512.pdf
    • https://static.usrfiles.com/ugd/de65f7_6ac4b6505bca4b6a8d5277023f92c521.pdf
    • https://static.usrfiles.com/ugd/3b0c81_943938eb75524a46b9618aa688126666.pdf
    • https://static.usrfiles.com/ugd/e02969_dd7996c25f4a4de3ac9c93b737bd286c.pdf
    • https://static.usrfiles.com/ugd/dcfb95_08f1b9ca95f74e93a858bb0f60eb4f4b.pdf
    • https://static.usrfiles.com/ugd/24deb6_22611dee222042259522b4866c1104f3.pdf
    • https://static.usrfiles.com/ugd/9d24cb_0d166b78bf3b45c28ee44fa205a0597a.pdf
    • https://static.usrfiles.com/ugd/a72fa8_6e5695961f8548ffa6455a0fdcc37b53.pdf
    • https://cdn.shopify.com/s/files/1/0480/9880/3875/files/62777839379.pdf
    • https://cdn.shopify.com/s/files/1/0432/4294/6728/files/92351062076.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_off0000f8a5.bin
11a7baa5efc8cdf4c6e09bcf9509c88c95a7cefb9d5e3caaa0b1858cec1d89a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A5 4952 bytes
font_01_sfnt_off00010965.bin
498f0c80134e9cff7bf82afcf019ad76221197a7d9b2e3e95c3b578202a265b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10965 11616 bytes

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