Malicious PDF — malware analysis report

Static analysis result for SHA-256 3539c819c12cc67e…

MALICIOUS

PDF

34.7 KB Created: 2020-08-20 08:37:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6688b63ff111f9a9436ee71a2af757f2 SHA-1: 6c2df33f7db47d60cfba553603645e6881eedd29 SHA-256: 3539c819c12cc67e5f452a180b05434b03e5757c7f4b1f096740a198a6213eae
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a title for a manual, likely a lure. The primary malicious URL identified is https://ttraff.com/pify?keyword=hunter+alignment+rack+manual, which is used to redirect the user. The presence of numerous Shopify links suggests an attempt to blend in with legitimate content while distributing the malicious payload.

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/pify?keyword=hunter+alignment+rack+manual
    • http://files.turtlecreekjc.com/uploads/1/3/0/7/130739532/4826638.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/jejuwelumopabonobofakeje.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/65860376976.pdf
    • https://cdn.shopify.com/s/files/1/0429/1490/6275/files/73455540093.pdf
    • https://cdn.shopify.com/s/files/1/0431/6839/9524/files/6367888298.pdf
    • https://cdn.shopify.com/s/files/1/0429/3692/6374/files/kupemofubaluwag.pdf
    • https://cdn.shopify.com/s/files/1/0432/4065/2960/files/85242417579.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wopeg.pdf
    • https://cdn.shopify.com/s/files/1/0448/0742/2109/files/9th_grade_biology_book_online.pdf
    • https://cdn.shopify.com/s/files/1/0429/8558/6849/files/tujojo.pdf
    • https://cdn.shopify.com/s/files/1/0440/3062/3894/files/46489955193.pdf
    • https://cdn.shopify.com/s/files/1/0427/9818/6652/files/60785792178.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_off00004bab.bin
a853527826475bdeb460871414e2f5e345f7f63cc8dad3e07e158f61e4005de8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BAB 4964 bytes
font_01_sfnt_off00005c6d.bin
ba89ab82b480a6a3f80412c78b29459c51749283edfeffb332d27de0810de43a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C6D 9924 bytes

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