Malicious PDF — malware analysis report

Static analysis result for SHA-256 28ab1caaa5d2c488…

MALICIOUS

PDF

43.0 KB Created: 2020-09-02 00:48:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45966a98be448dec8428ab0b90a866dc SHA-1: d499058ed749ed1ad223c52b88106eefbbf27009 SHA-256: 28ab1caaa5d2c488dc1c8dabcaa1e2e680b3ccc41a6ea55506498002289e5706
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to a domain identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/wix?keyword=buyers+guide+macbook+air', suggesting a lure to a phishing or scam page. The presence of numerous links to static.usrfiles.com indicates a link farm designed to improve SEO for malicious content.

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=buyers+guide+macbook+air
    • https://static.usrfiles.com/ugd/17beed_757c60d1b5bf44f58808f225fa8cbd99.pdf
    • https://static.usrfiles.com/ugd/0b46e6_462b1fbc3de04fb2b1b118448fc40ec5.pdf
    • https://static.usrfiles.com/ugd/0c8cc8_471ffde1ab514d3ca1bbe7918172401b.pdf
    • https://static.usrfiles.com/ugd/a2d007_536513fc33e9469a9305c58fa9118fe2.pdf
    • https://static.usrfiles.com/ugd/3d0627_5586f62352a34967bf239a2bed4002cc.pdf
    • https://static.usrfiles.com/ugd/b8c837_7f8215a9ea514b359c48464451532b64.pdf
    • https://static.usrfiles.com/ugd/64d889_6da7ab26c02a4b3da48dd3ba97964fe2.pdf
    • https://static.usrfiles.com/ugd/b8c837_79014978337143ef8aa256f3ebac420b.pdf
    • https://static.usrfiles.com/ugd/b47706_eb8a14fc40bc438788309ac922a06bc1.pdf
    • https://static.usrfiles.com/ugd/b8c837_5a77fbba861a436f9ccbe225fd91bce4.pdf
    • https://static.usrfiles.com/ugd/4b7290_0e9d97fc75174af58525071719e85487.pdf
    • https://static.usrfiles.com/ugd/b8c837_3bc711463b5543f9bfda39dff8fea57d.pdf
    • https://static.usrfiles.com/ugd/628a76_a48f9902518c47a5b74107b130ab2033.pdf
    • https://static.usrfiles.com/ugd/b8c837_888f59ec70074bd3a5890c41ceb6bcb8.pdf
    • https://cdn.shopify.com/s/files/1/0437/3407/3505/files/math_form_1_exercise.pdf
    • https://cdn.shopify.com/s/files/1/0431/4470/8245/files/natovevozaredizaguvaw.pdf
    • https://cdn.shopify.com/s/files/1/0436/2688/9369/files/natomoxexebozuletivuwo.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_off00006932.bin
d0d4ac1edcae2888cd41bfffc72d4d9fa58e7581db113b5f7d7a493bb765d1fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6932 5584 bytes
font_01_sfnt_off00007c22.bin
4ec87d061770063f6fb6dd58dbee4192f792b662f229583ede7b0a55e6ddb5a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C22 10140 bytes

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