Malicious PDF — malware analysis report

Static analysis result for SHA-256 eec76b8b5c87012f…

MALICIOUS

PDF

41.2 KB Created: 2020-08-01 08:56:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4aadf58815eba0b17842931ef0215984 SHA-1: 1cb66c8e4a7d7714893fdd89a6f81e079e8e8df9 SHA-256: eec76b8b5c87012f4226c9ce1e508039a92bb7a2701bf17b9e85d33716e5c4b5
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it links to malicious infrastructure. Additionally, PDF_SEO_LINK_FARM indicates a large number of external PDF links, likely for SEO manipulation or to host further malicious content. The primary malicious IOC is the redirector URL, which is designed to lead users to harmful sites. No scripts were extracted, and the document body was largely unreadable binary data.

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/pify?keyword=1+gallon+in+liters
    • http://files.ithinkibloggedmypants.com/uploads/1/3/1/0/131070452/4229144.pdf
    • http://files.stuartsnyder.net/uploads/1/3/1/4/131438176/doretokunejuraku.pdf
    • http://files.umesingapore.org/uploads/1/3/2/6/132695813/fotoza.pdf
    • https://cdn.shopify.com/s/files/1/0430/8454/6209/files/20449730266.pdf
    • https://cdn.shopify.com/s/files/1/0434/2834/8056/files/siworileborawituduxamumaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/9684/2142/files/18150838703.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/11067845032.pdf
    • https://cdn.shopify.com/s/files/1/0431/1800/2343/files/3151058219.pdf
    • https://cdn.shopify.com/s/files/1/0432/8118/6972/files/jebavunipavuboviku.pdf
    • https://cdn.shopify.com/s/files/1/0430/7540/3929/files/rulolipef.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50398535586.pdf
    • https://cdn.shopify.com/s/files/1/0433/8122/7672/files/gigujipofinozujaso.pdf
    • https://cdn.shopify.com/s/files/1/0431/3504/1693/files/ginuvedirutawusibosekavu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/95321691818.pdf
    • https://cdn.shopify.com/s/files/1/0437/3030/5175/files/16406611755.pdf
    • https://cdn.shopify.com/s/files/1/0428/5746/3964/files/3086225455.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_off00006542.bin
c0ec3a22fd69e090245baf6825b1c41cff425b22396437cbd465431ba65d6aca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6542 4808 bytes
font_01_sfnt_off000075b2.bin
cf9c967bc2e360248d366eee0aa1a6e14fdea204e8a7ad7313c282a25e36b25b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75B2 10124 bytes

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