Malicious PDF — malware analysis report

Static analysis result for SHA-256 890b5861ef341084…

MALICIOUS

PDF

40.4 KB Created: 2020-08-30 09:32:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5912fe61b6d5e1ed656ae81e2bf19a41 SHA-1: e95d973c69e7e2e92d2e9aa8c1ffa8fd9ba43525 SHA-256: 890b5861ef341084103bb441e697d548136471c822d00a08756b6405abc9e840
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in

The PDF file contains a large number of embedded links, a technique often used in SEO poisoning or to distribute malicious content. One of the embedded URLs, https://ttraff.ru/wix?keyword=letras+para+colorear+p, is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other PDF links, suggesting a coordinated effort to direct users to external sites. The presence of numerous links, including a malicious one, strongly indicates an attempt to lure users to potentially harmful destinations.

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/wix?keyword=letras+para+colorear+p
    • https://static.usrfiles.com/ugd/b8c837_7e2a167026e041c4b80dfde2865d0e21.pdf
    • https://static.usrfiles.com/ugd/b8c837_b7566470a67f4d2f9b2a0e6f8c7a8f65.pdf
    • https://static.usrfiles.com/ugd/b8c837_c4a9303f070e4eaf9df2091cfe583edf.pdf
    • https://static.usrfiles.com/ugd/2f7815_48f87433c5a040bb8eabd214e0ad696a.pdf
    • https://static.usrfiles.com/ugd/4725f1_8351a309db1e49d5885cd02c51a1ac44.pdf
    • https://cdn.shopify.com/s/files/1/0463/6691/6763/files/backyard_grill_portable_bbq_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/7062/7735/files/79323610706.pdf
    • https://cdn.shopify.com/s/files/1/0432/1312/7844/files/honda_civic_owner_s_manual.pdf
    • https://static.usrfiles.com/ugd/9cfd0a_37a152900cd146b7b91287a6c477313f.pdf
    • https://static.usrfiles.com/ugd/affaa6_1619788da80247638f042e24aa738d12.pdf
    • https://static.usrfiles.com/ugd/865d50_142add915971452e991cea6b5db56762.pdf
    • https://static.usrfiles.com/ugd/b28561_5e09688b872d488b9eb033c504739d5c.pdf
    • https://static.usrfiles.com/ugd/4c1554_0dbb79cd321449d29fd9d65d0ddcd38b.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_off00006245.bin
4dba1b5c9bf77243936521695595ae9d4cd0e3483f8693b123a416c6659edf98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6245 4868 bytes
font_01_sfnt_off000072da.bin
85d34be13d190a1650a882ee4d6d57770bbfa2dcf9968d2056e596b98e14a40b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72DA 10140 bytes

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