Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a34147e52028f36…

MALICIOUS

PDF

53.2 KB Created: 2020-09-09 16:29:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8177c671828796ad6f45d80a64e58714 SHA-1: f167316a9f37e92ec811177fa038c2eb8ac585e1 SHA-256: 4a34147e52028f363b1fb5c51d25fdc0c07264a8242672b17ed09b9dbde5576b
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with the primary URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.club/wix?keyword=gce+2019+english+question+and+answer', which is the initial entry point for the malicious redirection chain. The presence of numerous links to external PDFs, many hosted on similar domains, indicates a coordinated effort to distribute malicious content.

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.club/wix?keyword=gce+2019+english+question+and+answer
    • http://zekakix.westernhorseclub.com/uploads/1/3/1/3/131380213/xebenof.pdf
    • http://files.mrpielak.com/uploads/1/3/1/4/131406234/f5dff3b44.pdf
    • http://kovobisa.buffalovalleypuppies.com/uploads/1/3/0/7/130775478/358e5aa54812e.pdf
    • http://dudus.envirolaser.com/uploads/1/3/1/1/131163992/3712482.pdf
    • http://xexamis.mckennypto.org/uploads/1/3/0/7/130775740/kaxiputada-nuwuxenagugu-runuxeruwolimok.pdf
    • http://files.lockmangenetics.com/uploads/1/3/0/7/130775383/nizejab.pdf
    • https://static.usrfiles.com/ugd/77eba6_3b41612960e844f1b7ddda66a7922db8.pdf
    • https://static.usrfiles.com/ugd/b8c837_9b16d1d4224f41dd92eab41919879f9f.pdf
    • https://static.usrfiles.com/ugd/20d83a_d352079674614a2199d753c68b413037.pdf
    • https://static.usrfiles.com/ugd/99965f_e5cb0eb22c5740afa5ffe7c6fe902c51.pdf
    • https://static.usrfiles.com/ugd/6908d7_1005388e162a4344a5a2517bef9cd65c.pdf
    • https://cdn.shopify.com/s/files/1/0430/0128/2711/files/92139819905.pdf
    • https://cdn.shopify.com/s/files/1/0429/0209/3987/files/bhagat_singh_college_admission_form_2017.pdf
    • https://cdn.shopify.com/s/files/1/0434/7750/0056/files/bankers_algorithm_in_deadlock.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6273/files/81950067806.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_off00008747.bin
5e1b380fccb3c1b1352aac9fcb1e6779a35e6cc9c3ff172dee8ff4fed81ff143		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8747 5932 bytes
font_01_sfnt_off00009b87.bin
dabadec68cb46b277a8e1d0becdd3f4f6e2bb7506dddf12d2301b6c1ed04c1ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B87 13236 bytes

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