Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec2bc47506501d83…

MALICIOUS

PDF

34.2 KB Created: 2020-09-10 18:26:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ecfa264846f368e7480f6db68d57b34 SHA-1: a88bb975ca40fa5fb7ece8a763d8992c4cdcd102 SHA-256: ec2bc47506501d83148e076c1d77f854130849a0e5470bb815f468f68cda0604
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 link farm. The document body contains the URL 'https://ttraff.link/wix?keyword=ajedrez+en+linea+apk', which is also listed as a malicious redirector. The presence of numerous embedded links, many pointing to suspicious domains, strongly suggests an attempt to lure users to malicious sites.

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.link/wix?keyword=ajedrez+en+linea+apk
    • http://files.kurmconsulting.com/uploads/1/3/1/1/131163851/rodom.pdf
    • http://files.aussery.com/uploads/1/3/1/8/131871642/xawobunegak-wokiz-rigazavupekom.pdf
    • http://files.feedmycreative.com/uploads/1/3/1/8/131858540/sisur.pdf
    • https://static.usrfiles.com/ugd/1f6d71_8712886747ea4bafafe675f1ee734283.pdf
    • https://static.usrfiles.com/ugd/f6a907_f44e8d479064449abb1a23fec660ef7a.pdf
    • https://static.usrfiles.com/ugd/b8c837_f3fe03b5f37441ef8720a6ec74cb2d99.pdf
    • https://static.usrfiles.com/ugd/3b7182_9eecf81937ff4dc3b60a69ed8ee56928.pdf
    • https://static.usrfiles.com/ugd/cbe325_e2e99bb4979a4e62be0eb63249a9ada5.pdf
    • https://cdn.shopify.com/s/files/1/0463/6829/3019/files/wobodefilevetetobixemev.pdf
    • https://cdn.shopify.com/s/files/1/0429/8086/8255/files/muslim_girl_baby_names_with_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0436/0473/8206/files/kolowutiluluv.pdf
    • https://cdn.shopify.com/s/files/1/0438/6953/6411/files/288967022.pdf
    • https://cdn.shopify.com/s/files/1/0428/8416/9894/files/biwisarokiwilojavasufigi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2027/1264/files/26729028866.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_off00004719.bin
690511b28319764e2103a8726d4db1fcd7d20af4b039b386e6581e495d5fe177		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4719 4956 bytes
font_01_sfnt_off0000580d.bin
8b5b2bbe08b27e8d72db4d91907140bffbdee8da5f4509de1300d43056c9bf1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x580D 10656 bytes

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