Malicious PDF — malware analysis report

Static analysis result for SHA-256 81eeeb4acffd2306…

MALICIOUS

PDF

40.4 KB Created: 2020-09-02 06:03:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95fe7ea71bcb61733c0bccbf834fac3b SHA-1: 95250262654bff10a0876bbc3009ce68c753a85e SHA-256: 81eeeb4acffd2306958708f34b7e09fb24d77efeb28b52d27b92e07ac7441661
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, specifically pointing to 'https://ttraff.com/wix?keyword=sound+recorder+apk4fun'. This URL is presented within the document body, suggesting a social engineering lure to trick users into downloading potentially malicious software. The presence of numerous other PDF links, many hosted on cdn.shopify.com, indicates a link farm strategy, likely to improve SEO for the malicious redirector.

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/wix?keyword=sound+recorder+apk4fun
    • https://static.usrfiles.com/ugd/576447_57d35d0d642846ac90753a9301f2da45.pdf
    • https://static.usrfiles.com/ugd/6203b9_756d0e398f414c7e81d9f5e5dfe13510.pdf
    • https://static.usrfiles.com/ugd/c1de29_14209191fb87443eafce5c2c37b11762.pdf
    • https://static.usrfiles.com/ugd/37428b_1df03690533745adb13a05f6c2a5590e.pdf
    • https://cdn.shopify.com/s/files/1/0439/2009/7448/files/87851148690.pdf
    • https://cdn.shopify.com/s/files/1/0434/1478/2104/files/15574967421.pdf
    • https://cdn.shopify.com/s/files/1/0434/1540/4702/files/informamos_ainda_sinonimo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4224/2709/files/koxuke.pdf
    • https://cdn.shopify.com/s/files/1/0437/8837/0077/files/pijewotu.pdf
    • https://cdn.shopify.com/s/files/1/0435/3091/1899/files/kezevupuju.pdf
    • https://cdn.shopify.com/s/files/1/0435/6649/7960/files/35426931598.pdf
    • https://cdn.shopify.com/s/files/1/0432/0716/4064/files/21128654009.pdf
    • https://cdn.shopify.com/s/files/1/0431/3228/9175/files/tisoxiwolizivogudipeti.pdf
    • https://cdn.shopify.com/s/files/1/0429/2775/1321/files/vafirelitakigoguf.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_off00006128.bin
db0c7a49badc76e9f6e86914e77cec9e8336125137c152770a362443150b4f60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6128 5196 bytes
font_01_sfnt_off000072f1.bin
44745aadfdc5ebe836d1ecd517ee20518cd28afa995f5a6b7429f916a6916314		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72F1 10004 bytes

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