Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cb61687639b08bd…

MALICIOUS

PDF

44.0 KB Created: 2020-08-10 04:03:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6422b1fedf039a2da18bc7845f238ccd SHA-1: 42da1609b2ce6f525053985e2b2534d3eef0dc8a SHA-256: 8cb61687639b08bda94d615fd99ffc1d92e29e2f74cfab7c73b008cfec12b512
120 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, ttraff.com, which is likely intended to host further malicious content or phishing pages. The document body, though heavily obfuscated, contains text related to 'Benedict Anderson imagined communities summary pdf' and the authoring application 'wkhtmltopdf', suggesting a lure to disguise malicious intent. The presence of numerous external PDF links, many pointing to Shopify, indicates a link farm strategy, likely to improve SEO for the malicious redirector.

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=benedict+anderson+imagined+communities+summary+pdf
    • http://files.nrmg.ca/uploads/1/3/1/4/131406442/5515111.pdf
    • http://nenol.needahaircutripley.com/uploads/1/3/0/8/130813765/2942307.pdf
    • http://files.aerospectech.com/uploads/1/3/1/4/131407406/d9bf1b42052f1e7.pdf
    • https://cdn.shopify.com/s/files/1/0433/0491/1006/files/86776690614.pdf
    • https://cdn.shopify.com/s/files/1/0433/8620/8406/files/32118975449.pdf
    • https://cdn.shopify.com/s/files/1/0434/4496/1436/files/4784188723.pdf
    • https://cdn.shopify.com/s/files/1/0431/3622/1341/files/wupulixosiro.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30547733638.pdf
    • https://cdn.shopify.com/s/files/1/0428/5045/1623/files/97110277454.pdf
    • https://cdn.shopify.com/s/files/1/0429/1880/5657/files/13497696756.pdf
    • https://cdn.shopify.com/s/files/1/0438/2051/5488/files/short_term_disability_nj.pdf
    • https://cdn.shopify.com/s/files/1/0428/4363/5879/files/voxejineputiwanakinuda.pdf
    • https://cdn.shopify.com/s/files/1/0429/3427/2163/files/fubarato.pdf
    • https://cdn.shopify.com/s/files/1/0430/9614/6073/files/31994603130.pdf
    • https://cdn.shopify.com/s/files/1/0430/1045/7753/files/6005214703.pdf
    • https://cdn.shopify.com/s/files/1/0428/4894/4295/files/75875173355.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_off00006e07.bin
1818729bdf58f7b709178cb4befa4a85ba340bdb35e29ee0918c5a084df842c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E07 5596 bytes
font_01_sfnt_off00008101.bin
69dab44fdf332e004e798ec72a961b52b4bc5d3099f479c5d50843271230d9c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8101 9900 bytes

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