Malicious PDF — malware analysis report

Static analysis result for SHA-256 51045ec1d1c3e8cd…

MALICIOUS

PDF

34.8 KB Created: 2020-08-01 21:15:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96bb768e12fe105e903161c608d25df9 SHA-1: 19add20f4e1e0c140cf5162a627fb6b7e2ce4661 SHA-256: 51045ec1d1c3e8cd9f48751556fcad1cc7299a2aeebd58e5b8975be7bf02c732
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, indicating a link farm. The ML classifier also strongly indicated maliciousness. The primary malicious URL identified is https://ttraff.com/pify?keyword=cub+cadet+2186, which is likely used to redirect users to a malicious site. The document body contains obfuscated text and embedded URLs, consistent with a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=cub+cadet+2186
    • http://files.vegantuneupcafe.com/uploads/1/3/0/8/130814855/7815126.pdf
    • http://files.bonsaiphilippines.com/uploads/1/3/1/4/131407089/6498997.pdf
    • http://files.okmfg.com/uploads/1/3/1/1/131163747/4070118.pdf
    • http://files.hughespropertymaintenance.co.uk/uploads/1/3/1/4/131452929/kisiwe-wemow-zodibitabekov-duzugat.pdf
    • http://files.nativetales.com/uploads/1/3/0/7/130775942/b90bae542e.pdf
    • https://cdn.shopify.com/s/files/1/0437/1097/2053/files/bavasumejulefasupive.pdf
    • https://cdn.shopify.com/s/files/1/0432/0142/9662/files/somas.pdf
    • https://cdn.shopify.com/s/files/1/0430/2848/0157/files/jazovuvo.pdf
    • https://cdn.shopify.com/s/files/1/0427/8022/9791/files/54557307420.pdf
    • https://cdn.shopify.com/s/files/1/0428/4396/3548/files/sedilosixukekazovosut.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/vavipuvufusifirusosupu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7283/1134/files/19269058250.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lufixupiz.pdf
    • https://cdn.shopify.com/s/files/1/0431/9982/4032/files/megudejibepite.pdf
    • https://cdn.shopify.com/s/files/1/0434/0292/0086/files/cookie_clicker_import_save_code.pdf
    • https://cdn.shopify.com/s/files/1/0432/2633/3351/files/jixeteresegisarulajipuzo.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_off00004858.bin
68d7d6d19d334e1205b2d5911ce1334be1a220ccde0708bbd1354a4066e8ceca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4858 5204 bytes
font_01_sfnt_off00005a18.bin
b43c26afeae6831ebf6c37edfcbc0e310535ac9bee57ea3a2f030b1d4b254253		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A18 10680 bytes

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