Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc2744cf197cf385…

MALICIOUS

PDF

34.6 KB Created: 2020-08-25 02:42:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55b67de57fcd86f8ce634855eaf94cc7 SHA-1: d78538f378416d7bcc4e9460158ece8463674527 SHA-256: cc2744cf197cf3853c18b383d448729df351f4e90dc33d6aef1010063ff5d38f
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, with a critical heuristic firing indicating it's a malicious redirector link farm. The primary malicious URL identified is 'https://ttraff.ru/pify?keyword=lean+on+me+sheet+music+easy', which is likely used to obscure the ultimate destination of the attack. The document body itself is heavily obfuscated and contains many of the extracted URLs, suggesting a lure to entice users to click on these links.

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=lean+on+me+sheet+music+easy
    • http://files.tcnorthwestbaseball.com/uploads/1/3/1/4/131407080/117508.pdf
    • http://jutizavug.sweetcandydistro.com/uploads/1/3/1/6/131606289/423806.pdf
    • https://cdn.shopify.com/s/files/1/0432/0860/5859/files/93036983999.pdf
    • https://cdn.shopify.com/s/files/1/0434/3840/7845/files/disaster_risk_management_books.pdf
    • https://cdn.shopify.com/s/files/1/0434/3182/1473/files/diluxotixoboresigoxukaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/0695/9514/files/buyers_guide_used_cars.pdf
    • https://cdn.shopify.com/s/files/1/0452/3789/5325/files/cover_letter_for_engineering_jobs_fresh_graduate.pdf
    • https://cdn.shopify.com/s/files/1/0427/9920/2467/files/vifesizaxoriserinun.pdf
    • https://cdn.shopify.com/s/files/1/0437/1929/5131/files/jubaludusadezexixuxe.pdf
    • https://cdn.shopify.com/s/files/1/0440/6745/5128/files/femaneg.pdf
    • https://cdn.shopify.com/s/files/1/0461/1227/6644/files/86840137147.pdf
    • https://cdn.shopify.com/s/files/1/0431/9058/3458/files/matplotlib_plot_histogram.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rumifagekesodurelakalon.pdf
    • https://cdn.shopify.com/s/files/1/0434/0659/0106/files/5690041680.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_off00004931.bin
ea247d1e543a23015a93e91ee1e881bf0d8fe6f851c8500136369448579db07a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4931 4956 bytes
font_01_sfnt_off000059f3.bin
ad7e7feccc9d205f3004be8eec34323f2d31b754932a3d5ea343287d692cece7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59F3 10428 bytes

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