Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea4af64905bb890e…

MALICIOUS

PDF

40.9 KB Created: 2020-08-15 23:53:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8630f4547b007eca5fb5a9cfa5a75315 SHA-1: 75537dfb4ed5180c79dc6a73c935f29ab5d7a725 SHA-256: ea4af64905bb890ebf51f183824cd06618456c4236f72666a5341e6a14abe089
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with a primary link pointing to a redirector URL associated with malicious activity. The document body, though heavily obfuscated, contains text suggesting a lure related to 'blank affidavit form pdf', which aligns with the observed malicious redirector. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm designed to obscure the ultimate destination or to appear as legitimate content.

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/wb?keyword=blank%20affidavit%20form%20pdf
    • http://sufawaxi.paragliding-in-interlaken.com/uploads/1/3/0/7/130738542/megupo-puwizozivun-pemozakiwuzin-kerivolefumamem.pdf
    • http://files.tomhall.org.uk/uploads/1/3/0/9/130969695/2270760.pdf
    • http://zupipedat.dianehulseartist.com/uploads/1/3/0/7/130775129/0c504b0fc4b2f91.pdf
    • https://cdn.shopify.com/s/files/1/0435/6558/0437/files/68876115929.pdf
    • https://cdn.shopify.com/s/files/1/0430/2969/2577/files/nobozevupotoz.pdf
    • https://cdn.shopify.com/s/files/1/0432/4173/4311/files/98379202857.pdf
    • https://cdn.shopify.com/s/files/1/0437/6572/7383/files/lei_9610_direitos_autorais.pdf
    • https://cdn.shopify.com/s/files/1/0431/1685/5457/files/lolupu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/viborovikumowenaben.pdf
    • https://cdn.shopify.com/s/files/1/0433/9469/5329/files/1703416585.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/memew.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_off0000647e.bin
b50737608972cc04d71bf59358909fda195613e1959a9425b08efde242256a3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x647E 5180 bytes
font_01_sfnt_off00007610.bin
ef8ee375efe75e84c3bba8dc63d45f8c29d19dcd96e3452cf16353e7c5822900		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7610 9712 bytes

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