Malicious PDF — malware analysis report

Static analysis result for SHA-256 3344e4170ecd2cdc…

MALICIOUS

PDF

40.1 KB Created: 2020-08-19 17:59:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4fc132b07c6fe0a929f22d5308eb646 SHA-1: ceeafa908030057a11ec485aa576977204b7c5a7 SHA-256: 3344e4170ecd2cdcb7bd8cbc31eb1b4261f670532979ad0dc813fb1181aedd46
160 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as an answer key for an electron configuration worksheet. The document also exhibits characteristics of a link farm, embedding numerous links to other PDFs hosted on Shopify. The presence of a visible LOLBin command execution instruction suggests potential for further malicious activity, such as downloading and executing additional payloads.

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.
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • 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/pify?keyword=electron+configuration+worksheet+4+answer+key
    • http://files.dandelionartcenter.com/uploads/1/3/1/4/131437453/d2d771208cd8055.pdf
    • http://files.mandevilleelementarypta.org/uploads/1/3/1/8/131857890/zutewezodakisat.pdf
    • https://cdn.shopify.com/s/files/1/0428/4953/4111/files/82037939507.pdf
    • https://cdn.shopify.com/s/files/1/0430/1701/1353/files/vazojurisuwoni.pdf
    • https://cdn.shopify.com/s/files/1/0432/0428/0481/files/kutaj.pdf
    • https://cdn.shopify.com/s/files/1/0429/3863/0300/files/wget_java_8.pdf
    • https://cdn.shopify.com/s/files/1/0430/4545/3985/files/gamavarafefaxaf.pdf
    • https://cdn.shopify.com/s/files/1/0433/1647/8110/files/62760241579.pdf
    • https://cdn.shopify.com/s/files/1/0430/3729/4745/files/kuvizoliva.pdf
    • https://cdn.shopify.com/s/files/1/0428/1240/7967/files/61940519116.pdf
    • https://cdn.shopify.com/s/files/1/0434/7379/7284/files/filemezapeviposape.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_off00005e2c.bin
a576eef14c7c3604d35d4552b21dd7587c80449e6e1f76d62517bbb36f888070		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E2C 5448 bytes
font_01_sfnt_off000070d2.bin
930d2f420ac8fe808f5e8a0276950b4e9e0c8b0560ff01925308370b9d7567ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70D2 10208 bytes

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