Malicious PDF — malware analysis report

Static analysis result for SHA-256 fda34a8e2f741e06…

MALICIOUS

PDF

43.1 KB Created: 2020-09-02 02:33:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7627e10d35b9c161b85795a7459d87d6 SHA-1: 0b1310be1c02415c1b9bb0b689e7c1a115830597 SHA-256: fda34a8e2f741e0638057d9bee84b4734c614fe0a638f7728ee9a636c65d3880
160 Risk Score

Malware Insights

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

The PDF file contains a lure related to 'Fafsa form pdf instructions' and embeds a link to a known malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that the embedded URL leads to malicious infrastructure. Additionally, the 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests this PDF might be part of a multi-stage attack where the user is instructed to open a password-protected archive, likely containing the actual payload.

Heuristics 4

  • 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
  • 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=fafsa+form+pdf+instructions
    • https://static.usrfiles.com/ugd/808d8c_0c696bbdd5b044599c1ef376d0062a0c.pdf
    • https://static.usrfiles.com/ugd/b8c837_69da029af2184e1fa209b999be7c491a.pdf
    • https://static.usrfiles.com/ugd/405339_86268e34eb69451f84bf90beb4264bcc.pdf
    • https://cdn.shopify.com/s/files/1/0430/1727/3497/files/18453852206.pdf
    • https://cdn.shopify.com/s/files/1/0431/1544/6423/files/wugopironibuduvinutelit.pdf
    • https://cdn.shopify.com/s/files/1/0433/9613/7111/files/guia_de_la_unam_2017.pdf
    • https://cdn.shopify.com/s/files/1/0437/4780/3287/files/39904773377.pdf
    • https://cdn.shopify.com/s/files/1/0433/1051/4334/files/zuroraxolelalemapek.pdf
    • https://cdn.shopify.com/s/files/1/0429/8869/9802/files/bermuda_bus_timetable.pdf
    • https://cdn.shopify.com/s/files/1/0432/5838/0450/files/livoxojigugame.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c46.bin
773d9434a4f2fe9af1ec258c06b6c6e54aace6caa1b641c97afd600c5a912d35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C46 4988 bytes
font_01_sfnt_off00006d19.bin
f737bd384e588299c0dff3557358d594eb92bc81b63f3e9298220815ffe46187		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D19 10640 bytes
font_02_sfnt_off00009185.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9185 4324 bytes

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