Malicious PDF — malware analysis report

Static analysis result for SHA-256 50ea65f6dc7f05c3…

MALICIOUS

PDF

45.3 KB Created: 2020-07-29 10:23:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 817432e1bed8417ccfe4c45fdaca95a3 SHA-1: 782c72cbb1730b0dff53b86de6555e1164b9fdd4 SHA-256: 50ea65f6dc7f05c358eea713eae81474c6e63ca832cd7b377ce4afd39ad2df19
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one specifically pointing to a known malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates a direct link to malicious infrastructure. Additionally, the 'PDF_SEO_LINK_FARM' heuristic suggests a large number of external links, likely for SEO manipulation or to host further malicious content. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of numerous links strongly suggests a redirection-based attack pattern.

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=asc+606+deloitte+pdf
    • http://files.downtowncountrychristmas.com/uploads/1/3/2/6/132683017/kituxelima.pdf
    • http://files.agnihealth.org/uploads/1/3/1/4/131438639/3028161.pdf
    • http://files.sweetwoodilstudies.com/uploads/1/3/1/3/131380741/776202.pdf
    • http://files.nc956.com/uploads/1/3/1/8/131856330/4603187.pdf
    • https://cdn.shopify.com/s/files/1/0430/4555/2290/files/64438357177.pdf
    • https://cdn.shopify.com/s/files/1/0432/9753/8203/files/kewisuruv.pdf
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/91675723189.pdf
    • https://cdn.shopify.com/s/files/1/0432/3275/5875/files/juwevobefetafeduvirurebej.pdf
    • https://cdn.shopify.com/s/files/1/0435/2563/6248/files/78998105408.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/ruviv.pdf
    • https://cdn.shopify.com/s/files/1/0433/4170/9462/files/kosed.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/46845004140.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/pozekuvamelid.pdf
    • https://cdn.shopify.com/s/files/1/0433/4164/3928/files/wunarogimim.pdf
    • https://cdn.shopify.com/s/files/1/0434/1553/5774/files/gukevok.pdf
    • https://cdn.shopify.com/s/files/1/0437/0821/9547/files/wexenejunijanuludobip.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/
    • https://cdn.shopify.com/s/files/1/0432/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000754c.bin
692ac176a9574964a42e106209c107f0b6b2aff782472334da5d1eb3267d0905		 pdf-font-stream PDF embedded font (sfnt) at offset 0x754C 4808 bytes
font_01_sfnt_off000085ad.bin
d1ff182ae7146ce365f44313b0a7e264d269fe715c529621ea92851b25e6516a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85AD 10212 bytes

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