Malicious PDF — malware analysis report

Static analysis result for SHA-256 d636f7409384e4fc…

MALICIOUS

PDF

41.4 KB Created: 2020-08-11 17:17:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5df66cc137d199e37a6214beb97afc2e SHA-1: 7b6785e3987abf3156adaa0442817b314e27eb88 SHA-256: d636f7409384e4fc0b84e83b95368321bb0510742efffb6a3a22e8cadc589251
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic firing indicates a direct link to a known malicious redirector at `https://ttraff.ru/pify?keyword=basic+mathematics+for+astronomy+pdf`. This suggests the document is designed to funnel users through a series of redirects, likely to a phishing or malware distribution site. No scripts were extracted from this sample.

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=basic+mathematics+for+astronomy+pdf
    • http://files.hilaryhachey.com/uploads/1/3/1/6/131637656/zenugun.pdf
    • http://files.skylinekennelclub.org/uploads/1/3/0/8/130874015/tevepepa.pdf
    • http://files.rothbartnorthshore.com/uploads/1/3/1/4/131482819/e728a687.pdf
    • http://files.snyder-pharmacy.com/uploads/1/3/1/6/131607712/mimalopedurijixolu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1725/6603/files/89551127913.pdf
    • https://cdn.shopify.com/s/files/1/0432/9639/1323/files/58638968113.pdf
    • https://cdn.shopify.com/s/files/1/0430/9581/8404/files/both_and_neither_nor_either_or.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fenajowogotuxukat.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tokon.pdf
    • https://cdn.shopify.com/s/files/1/0438/3303/2864/files/xavijad.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/78809450679.pdf
    • https://cdn.shopify.com/s/files/1/0433/5943/6951/files/temple_of_elemental_evil_walkthrough.pdf
    • https://cdn.shopify.com/s/files/1/0431/0063/5290/files/unity_lerp_rotation.pdf
    • https://cdn.shopify.com/s/files/1/0437/2194/9335/files/28366105861.pdf
    • https://cdn.shopify.com/s/files/1/0435/8114/5243/files/osu_whirecat_skin.pdf
    • https://cdn.shopify.com/s/files/1/0428/6378/8188/files/41299683204.pdf
    • https://cdn.shopify.com/s/files/1/0435/6902/1089/files/27522534702.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_off0000621a.bin
fdb8ca3dc40a1225c8d647ecc4e6beb20a4ca0b7792a2a081b9c6898163808a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x621A 5516 bytes
font_01_sfnt_off000074b4.bin
df6da942b1cd3fadfea00386c60918cd16d41f1f41c4aa815d3f0fb3bf63dfd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74B4 10420 bytes

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