Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6994d5aa6949b7d…

MALICIOUS

PDF

37.2 KB Created: 2020-08-03 07:36:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81d8d3a1b32010e6ef76ec1d34c5a60b SHA-1: abd3d4dd252bd82ea43f3f7c11076a57664c9778 SHA-256: c6994d5aa6949b7d3d1100c9b6b17b40eae660e10edcdc930719569cfc9856f2
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Dell 3110 cn drivers' and the malicious URL, suggesting a lure to download malicious content. The presence of a malicious redirector indicates a likely attempt to deliver a second-stage payload.

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/pify?keyword=dell+3110+cn+drivers
    • http://files.fastvinylsigns.co.uk/uploads/1/3/0/8/130813732/e9f6eed78d.pdf
    • http://files.pound4poundathletics.com/uploads/1/3/1/8/131871816/2091625.pdf
    • http://files.millbrookrotarydirectory.com/uploads/1/3/0/7/130775846/d99ea.pdf
    • https://cdn.shopify.com/s/files/1/0429/3486/1987/files/64436568794.pdf
    • https://cdn.shopify.com/s/files/1/0431/5555/4458/files/97350652117.pdf
    • https://cdn.shopify.com/s/files/1/0433/8217/7946/files/61787898088.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27247465441.pdf
    • https://cdn.shopify.com/s/files/1/0433/7080/7459/files/pejovoniluvopuraf.pdf
    • https://cdn.shopify.com/s/files/1/0432/0926/1220/files/taylormade_r9_driver.pdf
    • https://cdn.shopify.com/s/files/1/0429/5468/6630/files/40379321381.pdf
    • https://cdn.shopify.com/s/files/1/0432/1034/2559/files/80389690904.pdf
    • https://cdn.shopify.com/s/files/1/0429/5104/9370/files/nudafitutak.pdf
    • https://cdn.shopify.com/s/files/1/0427/9785/8972/files/kingdom_hearts_2_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/3678/7356/files/42956036870.pdf
    • https://cdn.shopify.com/s/files/1/0435/8563/4463/files/40127492684.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_off000053ef.bin
7dba892df84a1ab1806fa32a43d23ccffd4bc4573a941af393e23735dacfdadc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53EF 5140 bytes
font_01_sfnt_off00006592.bin
0198fe34f089b8e3765491abf0789f9913077ad1feac283f324865ba06d0e372		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6592 10084 bytes

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