Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0d838eae0bae23f…

MALICIOUS

PDF

32.6 KB Created: 2020-08-30 18:47:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e17edf220236929b46d1bb542ec2c3b SHA-1: f7a8cd4ab5d76866984aef988bf52d2246ca4304 SHA-256: d0d838eae0bae23fe1f9e20ef57912bd5650527cd7f54d5aebe9090cee0c2316
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which is the primary indicator of malicious intent. The document body, though heavily obfuscated, contains text that appears to be a lure for a PDF titled 'The complete guide to ecgs 4th edition pdf'. The redirector URL is designed to lead the user to a malicious site, likely for phishing or malware delivery. The presence of a large number of external PDF links also suggests a link farm, potentially for SEO poisoning or to obscure the final malicious destination.

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.link/wix?keyword=the+complete+guide+to+ecgs+4th+edition+pdf
    • https://cdn.shopify.com/s/files/1/0433/5140/8799/files/zaronekutodejevo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9704/7718/files/juzuvamunenutexeguje.pdf
    • https://cdn.shopify.com/s/files/1/0439/8333/9678/files/americorps_logo.pdf
    • https://cdn.shopify.com/s/files/1/0438/6013/2005/files/88929414484.pdf
    • https://cdn.shopify.com/s/files/1/0440/5926/3141/files/nolulok.pdf
    • https://cdn.shopify.com/s/files/1/0463/1828/9053/files/handbook_stoeltings_anesthesia_coexisting_disease.pdf
    • https://cdn.shopify.com/s/files/1/0438/1255/2864/files/city_gangster_games.pdf
    • https://static.usrfiles.com/ugd/0dd040_5d2496f6899f48c59b5ca2ed2f8227b5.pdf
    • https://static.usrfiles.com/ugd/4826f5_dc7ceaeead7e4cf1a11f729808920c79.pdf
    • https://static.usrfiles.com/ugd/b8c837_c8720849d8cc43cc9628223bf32455db.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_off000040e3.bin
30807b40c8c8a37be494118f61e67b1a5b2a99aa279107bb19954310c4bcbf70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x40E3 5300 bytes
font_01_sfnt_off000052d8.bin
d4067925c752a156a68c8ac3e28f7d263883e9432c2b53e59b53efedaf526860		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52D8 9844 bytes

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