Malicious PDF — malware analysis report

Static analysis result for SHA-256 56ab72c3416c243f…

MALICIOUS

PDF

41.1 KB Created: 2020-09-01 13:07:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fdc45682c68b39aeef696f740489709f SHA-1: c27344f060d7bbf9df2fe8b45eb64503991bc420 SHA-256: 56ab72c3416c243fc2f582e42befbed577e3e1eb999c286e001f84694e84e50b
168 Risk Score

Malware Insights

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

The PDF contains a link disguised as a 'Cyber crime report in nepal' which redirects to malicious infrastructure at ttraff.com. The document also includes a mass of external PDF links, many pointing to cdn.shopify.com, suggesting a link farm or SEO poisoning attempt. The presence of a 'password-protected archive handoff' lure indicates an attempt to bypass security controls by encrypting a payload, which is then likely delivered via the malicious redirector.

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=cyber+crime+report+in+nepal
    • https://static.usrfiles.com/ugd/430cb2_dba44ef0caa846cf8374a0d682142fe5.pdf
    • https://static.usrfiles.com/ugd/de02f3_f62a0d9737ea411784be94bce8712441.pdf
    • https://static.usrfiles.com/ugd/d43733_8027d3612aa54ba6b00cf31d4c05aab8.pdf
    • https://cdn.shopify.com/s/files/1/0433/0101/1614/files/85033454441.pdf
    • https://cdn.shopify.com/s/files/1/0440/7522/1142/files/69514484287.pdf
    • https://cdn.shopify.com/s/files/1/0429/4233/3084/files/dakufiwulafiwexoxisen.pdf
    • https://cdn.shopify.com/s/files/1/0438/4371/5229/files/wefusuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/5152/4008/files/purawuguvowiwawuxuzojin.pdf
    • https://cdn.shopify.com/s/files/1/0434/3421/3542/files/manejo_de_camelidos_sudamericanos.pdf
    • https://cdn.shopify.com/s/files/1/0432/0044/6626/files/12726440577.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_off00006318.bin
2dbab41f0db95cb66c586df8877fc6440822e76dc71961c05a74068494047083		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6318 5048 bytes
font_01_sfnt_off00007432.bin
aefc1845c4dccc82bac39ce42a80a0020e7e43cfc2bf50ecb6fadeb49d2b0107		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7432 10620 bytes

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