Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b3b4421dc40b371…

MALICIOUS

PDF

52.2 KB Created: 2020-08-29 04:05:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91a5a55e5f74b1f1a32d91ab9ef41c13 SHA-1: 6724f3e3902557de343ff74e0c57db50a0754ae1 SHA-256: 2b3b4421dc40b3714ffae12bf1507a4cec5706164aaa0ae38cbc9297045c1758
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=bpsc+geography+optional+notes+in+hindi+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. Additionally, a PDF SEO link farm heuristic was triggered, suggesting the document is part of a larger campaign to generate traffic to various external links, including the identified malicious one.

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=bpsc+geography+optional+notes+in+hindi+pdf
    • https://static.usrfiles.com/ugd/b8c837_90644722b4944c36be91780c1542a9de.pdf
    • https://static.usrfiles.com/ugd/b8c837_9f1dc50d4e64420ebe5f7f549c71a20b.pdf
    • https://static.usrfiles.com/ugd/b8c837_0ff9511d5cd44828b7cc1a251935ddcf.pdf
    • https://static.usrfiles.com/ugd/b8c837_656e513a77274f1c97b5d609382164e4.pdf
    • https://cdn.shopify.com/s/files/1/0430/3545/9738/files/sozakuvo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8992/8096/files/distressed_debt_investing_moyer.pdf
    • https://cdn.shopify.com/s/files/1/0470/9538/2174/files/rimavujotirimegelalozow.pdf
    • https://static.usrfiles.com/ugd/b8c837_9a82ae17b5144f42893c9c807b15cc34.pdf
    • https://static.usrfiles.com/ugd/b8c837_a85aa1e089fd48a68b3fad5229d7176d.pdf
    • https://static.usrfiles.com/ugd/b8c837_a307bbaee50b4c20bc0aacb279b4e8b8.pdf
    • https://static.usrfiles.com/ugd/b8c837_d7a5154abc534d9fb684c0cba3385b6e.pdf
    • https://static.usrfiles.com/ugd/b8c837_a4dd8bd25a5e492e891fe046cea3f4d5.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000468d.bin
782ef52b7ffa71ed6def145c442df8e62db4341112000f20890d8826635f6a37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x468D 5356 bytes
font_01_sfnt_off000058b1.bin
6e5de5c6bcb7fdd8c5ca0d25823a8f80e6c764803c1b732dbc9c425a5c0f8ea5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58B1 2092 bytes
font_02_sfnt_off00006257.bin
03b356a465b0915e1890d856a6bb884c39d90ab2d4ac800e7c1d442cdf3af356		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6257 10136 bytes
font_03_sfnt_off000084c6.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84C6 16164 bytes
font_04_sfnt_off000099db.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99DB 4324 bytes
font_05_sfnt_off0000a7dd.bin
55709616312549da02e20a9573ae2dd1dbb2f612b33eada28b150ca75b9acdfb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7DD 7192 bytes

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