Malicious PDF — malware analysis report

Static analysis result for SHA-256 28958e9c4abd1429…

MALICIOUS

PDF

49.0 KB Created: 2020-08-31 06:24:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e42ec704e6bc03d631dbfc4c6e5b13c SHA-1: 88dd1d3eb94f891637bc88dfa8e2e02c3f116189 SHA-256: 28958e9c4abd142939970a2edbf3115dfbe1dd3ff0a2644d7b9ddcc880cf3d4c
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains numerous links, masquerading as a label size guide, that point to a malicious redirector. The primary heuristic indicates a PDF redirector link to ttraff.ru, which is known malicious infrastructure. The document body, though heavily obfuscated, contains the URL that triggers the heuristic. No scripts were extracted from this sample.

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=avery+label+sizes+guide
    • https://cdn.shopify.com/s/files/1/0430/2821/8019/files/siva_manasila_sakthi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7857/3464/files/56892182267.pdf
    • https://cdn.shopify.com/s/files/1/0438/8772/2648/files/75764782475.pdf
    • https://cdn.shopify.com/s/files/1/0431/0725/4439/files/13798605264.pdf
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/56909544601.pdf
    • https://static.usrfiles.com/ugd/b8c837_8bf31c7c142f4e958bbff2bf0738e565.pdf
    • https://static.usrfiles.com/ugd/0cd3a8_13a3d913c9f946feaa96455651ebc87f.pdf
    • https://static.usrfiles.com/ugd/3826db_c6e81e75770941739646acad6b3eb2e3.pdf
    • https://static.usrfiles.com/ugd/b8c837_d4596a7deb9a4e2b80d4de45785102e6.pdf
    • https://static.usrfiles.com/ugd/b8c837_6f843f2230d04802a9bf72260ef7aaef.pdf
    • https://cdn.shopify.com/s/files/1/0427/7587/1654/files/6734784262.pdf
    • https://cdn.shopify.com/s/files/1/0429/1146/5638/files/makoxufetomilobebojojofaf.pdf
    • https://cdn.shopify.com/s/files/1/0436/4196/2646/files/jackpotjoy_plc_annual_report.pdf
    • https://cdn.shopify.com/s/files/1/0430/6187/0743/files/50510858779.pdf
    • https://cdn.shopify.com/s/files/1/0437/7290/3578/files/kumolinekuwebaba.pdf
    • https://cdn.shopify.com/s/files/1/0429/8421/0583/files/lonmin_bursary_application_form_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/4678/0566/files/wobago.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_off000077bc.bin
be00046fb400452b06e5fede71412f867040a828834548080f4c11c0353571b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77BC 5336 bytes
font_01_sfnt_off000089fb.bin
cdb41cb8df05cd8680b4e4d18c5c88c1389241249604c4de7ce7fd5b22b69d71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89FB 13928 bytes

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