Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d123c73a85c97d2…

MALICIOUS

PDF

32.0 KB Created: 2020-09-08 14:14:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00b596c37e66d7c16ff3ae0551c261ab SHA-1: 84fb4ec03ff83f4fb67412cc710fc5bd22263f96 SHA-256: 8d123c73a85c97d22e630cba741e8b000bef7e8a83d00fb5a537d4c973784c1d
150 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to a domain known for redirecting to malicious content. The document body, though heavily obfuscated, appears to contain text related to 'Amco insurance company contact information' and includes the primary malicious URL. The presence of a PDF_MALICIOUS_REDIRECTOR_LINK heuristic firing strongly indicates an attempt to redirect the user to a harmful site, likely for phishing or malware distribution.

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.ru/pify?keyword=amco+insurance+company+contact+information
    • https://static.usrfiles.com/ugd/7a13df_e05a09e223734ab19ea02a2756a8cc23.pdf
    • https://static.usrfiles.com/ugd/2d797c_06f08796681f4e1aae9ee676db589c2e.pdf
    • https://static.usrfiles.com/ugd/04e6f9_2f0e78504128404b94c7213b3084b317.pdf
    • https://static.usrfiles.com/ugd/dd6616_8982920482694ae18583f116d4463f1b.pdf
    • https://static.usrfiles.com/ugd/0789d5_4c02f314a3a04ca5b618459e2c625a37.pdf
    • https://static.usrfiles.com/ugd/be5703_cd9834100d1b4a199225fa668e0761d3.pdf
    • https://static.usrfiles.com/ugd/362633_ae1429a2bc7e4d238582e50f41228c3a.pdf
    • https://static.usrfiles.com/ugd/162fe6_01edf1d13aaa42fdba1dd7c9443f40f5.pdf
    • https://static.usrfiles.com/ugd/13ae68_3771af4ff23e495eb31a99703b79caa6.pdf
    • https://static.usrfiles.com/ugd/45fd81_5bf516f5f35b4d42b521e4703e5b6d52.pdf
    • https://static.usrfiles.com/ugd/9f69bd_af1a96fc5604436196561e885a58ae2f.pdf
    • https://static.usrfiles.com/ugd/71fd01_181174d7208e4991b7e987a6376050d3.pdf
    • https://static.usrfiles.com/ugd/c0b427_c96a7a31440f4954befb8b294a09c3f1.pdf
    • https://static.usrfiles.com/ugd/9ec29b_bfd5c78df2944287aff0bc488db87faa.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_off000043aa.bin
252d1821c56356d9c5886a0464f0759d17017e01c6d52787b30b05ab47c5e093		 pdf-font-stream PDF embedded font (sfnt) at offset 0x43AA 5220 bytes
font_01_sfnt_off00005564.bin
e7ef7ea9d5a91a6e9ba170694e4f8e2233dc50abbeba77da79fd0263df42a005		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5564 8760 bytes

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