Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c287c4624506a4a…

MALICIOUS

PDF

46.5 KB Created: 2020-09-19 22:58:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8011a7632e6ba92b20e81e9b7351da63 SHA-1: 9101cfc8607e9e6674952ff3680a0916bd91bf2b SHA-256: 9c287c4624506a4afd501e66d01196a13537f014a5431dd94610593d1dcb6c2b
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to external PDF files, which is indicative of a link farm or a method to obscure malicious intent. The primary heuristic firing highlights a link to a known malicious redirector, 'https://ttraff.link/wix?keyword=geometria+analitica+formulas', suggesting the document's purpose is to redirect users to malicious content. The document body, though heavily obfuscated, contains this same URL and references to 'wkhtmltopdf', indicating it was likely generated programmatically to host 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.link/wix?keyword=geometria+analitica+formulas
    • http://jediv.rewoca.org/uploads/1/3/1/4/131407089/6824385.pdf
    • http://wemupon.iustuff.net/uploads/1/3/0/9/130969761/1355626.pdf
    • http://sibof.northposeybasketball.com/uploads/1/3/1/3/131384721/mudajagazazoxape.pdf
    • http://files.invigorationnovelties.com/uploads/1/3/1/4/131455475/senafanawuse-dejiropol-fezetabalebimuv-metuz.pdf
    • http://xetufav.marleneinteriors.com/uploads/1/3/1/6/131606346/596191.pdf
    • https://cdn.shopify.com/s/files/1/0438/4771/2928/files/likomugujizuvomer.pdf
    • https://cdn.shopify.com/s/files/1/0433/6805/4940/files/8132439738.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48466687054.pdf
    • https://cdn.shopify.com/s/files/1/0438/0403/3181/files/lofewetegifexi.pdf
    • https://81d43b2d-5142-4730-aa83-00d8a29eeb39.filesusr.com/ugd/417718_14f7668d893840e5bb0b1754e3be8e46.pdf?index=true
    • https://0ca05a9a-26c8-4a07-8b69-f857eee4a62e.filesusr.com/ugd/62e2c1_a90279efe4e044d5867a7bb4a3b00cdb.pdf?index=true
    • https://67e22141-a2e6-4e1d-941e-2d50546dd7e8.filesusr.com/ugd/2994dd_57a938184e554b1f8e659ddc9812d5b4.pdf?index=true
    • https://570172ec-1f21-4b60-b7d3-d8c146cb179c.filesusr.com/ugd/e3325f_6699dc0fd6694976bf46320ac8730946.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006343.bin
baa111461e9535d135fdcc2ef69d9254e403782877f9220b1049d75e2f1ab52b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6343 5056 bytes
font_01_sfnt_off0000745f.bin
6b00f98bc17627d5ff42030f85b6d6151349852d7537f4b6f1746139358e11dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x745F 10068 bytes
font_02_sfnt_off00009703.bin
fb2ac63fb075d256b5587570191ecec806cb29c29da4ebedfc8653ce907d9040
pdf-font-stream PDF embedded font (sfnt) at offset 0x9703 16384 bytes