Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff9c23fc64ee429b…

MALICIOUS

PDF

71.8 KB Created: 2020-08-15 02:02:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7dcd2cba285387dc256bb20f54cf12eb SHA-1: 844b86fcb8cdfc4b7aa3ed97a953d745dbcf7118 SHA-256: ff9c23fc64ee429bbc991b3d414a3bdc0e66a7b97701702efe92af30337af12c
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates that the PDF links to known malicious redirector infrastructure, specifically `https://ttraff.com/wb?keyword=conservative%20treatment%20of%20the%20cubital%20tunnel%20syndrome%20pdf`. This suggests the document's primary purpose is to redirect users to malicious sites, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains the same URL, reinforcing this finding.

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/wb?keyword=conservative%20treatment%20of%20the%20cubital%20tunnel%20syndrome%20pdf
    • http://files.learn2readoc.org/uploads/1/3/2/6/132682441/rukesup.pdf
    • http://gobeg.pugetsounddoulas.com/uploads/1/3/1/8/131871699/5477077.pdf
    • http://files.sncounselor.com/uploads/1/3/1/6/131637308/1825420.pdf
    • http://files.swimbridgepreschool.com/uploads/1/3/2/7/132712000/tazafilur.pdf
    • https://cdn.shopify.com/s/files/1/0429/2739/0887/files/wirurevozepaxiditug.pdf
    • https://cdn.shopify.com/s/files/1/0431/5611/1520/files/57998743152.pdf
    • https://cdn.shopify.com/s/files/1/0430/2870/9539/files/vupafifabubezogor.pdf
    • https://cdn.shopify.com/s/files/1/0432/7145/4883/files/programa_para_unir_online.pdf
    • https://cdn.shopify.com/s/files/1/0438/5662/5829/files/pseudobulbar_affect_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0437/4183/9511/files/7_ton_usmc.pdf
    • https://cdn.shopify.com/s/files/1/0431/4464/2716/files/game_virtual_villagers_5_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/3547/5624/files/64344518755.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wupukibasabozuxijixosi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0130/6526/files/questionnaire_sur_l_absentisme_au_travail.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9680354999.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_off0000d2b4.bin
9eb3510375700005d96400d8dda59ab21bd3e2853092419b5d154eae0b0fa896		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B4 5604 bytes
font_01_sfnt_off0000e598.bin
5e5da17d65df0ec64b497d50f1dbd56d4d07973d1d5ee94eee1f98e99999cbea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE598 13828 bytes

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