Malicious PDF — malware analysis report

Static analysis result for SHA-256 b53e5686ef323c6a…

MALICIOUS

PDF

47.5 KB Created: 2020-08-31 01:23:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ec4253b5deffee7d564454f35530841 SHA-1: b9a13d2d043a0e44c6ee79833ac48759790e3f03 SHA-256: b53e5686ef323c6a47b3d4c82f0de16e7ca3d8a00fe85d9ccc422f7cd825a5e8
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a link to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting a lure to a malicious site. The presence of a link farm heuristic further supports the malicious intent of redirecting users to external, potentially harmful 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=mem%25C3%25B3rias+da+segunda+guerra+mundial+winston+churchill+pdf
    • https://cdn.shopify.com/s/files/1/0431/9969/2958/files/21399945523.pdf
    • https://cdn.shopify.com/s/files/1/0427/3173/3159/files/ravovixogifefisimunelinaj.pdf
    • https://cdn.shopify.com/s/files/1/0440/5349/5958/files/45497278198.pdf
    • https://cdn.shopify.com/s/files/1/0431/1239/9009/files/wuwagabuligumivin.pdf
    • https://cdn.shopify.com/s/files/1/0434/4433/8838/files/12478406136.pdf
    • https://cdn.shopify.com/s/files/1/0430/8316/9943/files/yakuza_0_legend_style.pdf
    • https://cdn.shopify.com/s/files/1/0429/7333/1609/files/17347249690.pdf
    • https://cdn.shopify.com/s/files/1/0431/2567/0042/files/33028573510.pdf
    • https://cdn.shopify.com/s/files/1/0440/2269/4046/files/81935936529.pdf
    • https://static.usrfiles.com/ugd/1849a1_277e8089e71b4f6ab7786e07994c74cf.pdf
    • https://static.usrfiles.com/ugd/b972d5_813cf22415ec4c1aa20a34b4c70082cc.pdf
    • https://static.usrfiles.com/ugd/e2c250_f8475be3933040ad9430eaef341597fc.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/
    • https://cdn.shopify.com/s/files/1/0429/7333/1609/f

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071fa.bin
0d003bd851cead96e5c362eff15719801526827b6f752d69730e7e937be6cf10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71FA 5800 bytes
font_01_sfnt_off00008560.bin
84061f5a930f3efaf79016856500c200a0e5c0999afacca14b004b9e9dab4c1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8560 13536 bytes

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