Malicious PDF — malware analysis report

Static analysis result for SHA-256 8387670bfcb785c3…

MALICIOUS

PDF

35.6 KB Created: 2020-07-27 08:27:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 579e906c25107ee1887bb08e5801fa81 SHA-1: 828a0db251f1c19130ed646838c76335b7dc7303 SHA-256: 8387670bfcb785c302c6a3b583a52ff6b3ae4b0fa5c9e7a3e2d253b7b38129bc
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs. One critical heuristic identified a link to a known malicious redirector, while another flagged a mass of external PDF links, suggesting an attempt to manipulate search engine results or distribute malicious content. The document body is heavily obfuscated and does not provide clear user-facing content, further supporting the interpretation of a non-standard document purpose.

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=assamese+all+new+song+2019
    • http://files.allisanellwood.com/uploads/1/3/0/7/130776490/vofawedapo_nalupufamepeti_lemafaxajogeno.pdf
    • http://files.supportbisd.com/uploads/1/3/1/8/131858540/1039494.pdf
    • http://files.jolietwestlibrary.com/uploads/1/3/2/3/132302894/b4f3c6401.pdf
    • http://files.mrsvietnamworld.net/uploads/1/3/0/7/130740033/biwamufu.pdf
    • http://files.mrsvietnamworld.net/uplo
    • https://cdn.shopify.com/s/files/1/0429/5278/6074/files/bokekisivufelaju.pdf
    • https://cdn.shopify.com/s/files/1/0438/1730/4226/files/6778789670.pdf
    • https://cdn.shopify.com/s/files/1/0433/3387/7915/files/42756649920.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/15422892056.pdf
    • https://cdn.shopify.com/s/files/1/0435/6440/0798/files/kofisonezudoduvuguv.pdf
    • https://cdn.shopify.com/s/files/1/0429/1058/0902/files/fusirudaze.pdf
    • https://cdn.shopify.com/s/files/1/0429/1729/8342/files/79056689788.pdf
    • https://cdn.shopify.com/s/files/1/0431/6758/0322/files/kobudodakusa.pdf
    • https://cdn.shopify.com/s/files/1/0428/1463/6198/files/boragapokoxufimij.pdf
    • https://cdn.shopify.com/s/files/1/0433/2843/8427/files/nedubefaviponitop.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/18559935921.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_off000051d2.bin
ebd58a248d42c14bab76abbc01a1e8b0e89bce5f1cd8d35fb8b8adcc2b41b5ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51D2 5132 bytes
font_01_sfnt_off00006339.bin
849351a06439f97269722ef964aee30362c6e44089c0e0bae82e6144c6cb9795		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6339 8904 bytes

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