Malicious PDF — malware analysis report

Static analysis result for SHA-256 46b4d4d5c5c7db06…

MALICIOUS

PDF

49.5 KB Created: 2020-08-23 09:06:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c14c9917ca608a8fd7bc6acad644dc4 SHA-1: 3c5a3823dd5900fa4b62cd04fd69088be95af97a SHA-256: 46b4d4d5c5c7db069c0d5d3242f7df9f40d78460a432bb8835b4fa9f07bcef5e
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains a URL that appears to be the same as the one identified by the heuristic. This suggests the document's primary purpose is to redirect the user to malicious infrastructure, likely for further exploitation or phishing. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm or SEO poisoning tactic to distribute the 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.ru/pify?keyword=aahat+bengali+serial+free
    • http://files.designingaccess.biz/uploads/1/3/0/7/130776673/5800518.pdf
    • http://danuno.nagreeconsulting.com/uploads/1/3/1/6/131637254/562233.pdf
    • http://desipeva.beekeeperssecret.com/uploads/1/3/2/6/132680839/tobas.pdf
    • http://lawag.lonelymountainfilms.com/uploads/1/3/2/6/132695471/vetawaresik.pdf
    • http://geags.com/19rglz
    • https://cdn.shopify.com/s/files/1/0429/5802/8959/files/xojegadason.pdf
    • https://cdn.shopify.com/s/files/1/0430/5967/5293/files/52804025815.pdf
    • https://cdn.shopify.com/s/files/1/0431/7668/9825/files/leckie_and_leckie_physics_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/5548/7905/files/najutodofobuwin.pdf
    • https://cdn.shopify.com/s/files/1/0432/4638/7362/files/49548357687.pdf
    • https://cdn.shopify.com/s/files/1/0431/3271/5163/files/1270496443.pdf
    • https://cdn.shopify.com/s/files/1/0439/3140/2395/files/piperobi.pdf
    • https://cdn.shopify.com/s/files/1/0440/1358/4542/files/tigalogosibuxid.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/jijufuja.pdf
    • https://cdn.shopify.com/s/files/1/0430/7786/1527/files/kixumokebusokuluzak.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2470/files/45923463867.pdf
    • https://cdn.shopify.com/s/files/1/0432/1175/1588/files/95430174064.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_off00008443.bin
b49400509e000ff476c147a5955a4fe81b7598f187396e69f3a903cc7ddc0bb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8443 5160 bytes
font_01_sfnt_off000095cb.bin
37c053ffed34ef2862f3ab000bf575676049c6fe61ddf1e3fe33e2a9940ee648		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95CB 10252 bytes

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