Malicious PDF — malware analysis report

Static analysis result for SHA-256 a56544c3130e9b28…

MALICIOUS

PDF

44.6 KB Created: 2020-07-31 19:01:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85f42b50b351f40da83b5a79243ea7bf SHA-1: f0d67a6534f53d9f9ea2296159833e77f141d29a SHA-256: a56544c3130e9b2845b2705fd1f7212854fbf51b5a0733e914e313cf80abc8b2
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The document body, though heavily obfuscated, contains a reference to 'Java drawing program' which likely serves as a lure for the malicious link. The primary attack vector appears to be social engineering via a deceptive link within the PDF.

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=java+drawing+program
    • http://files.clayguyry.com/uploads/1/3/1/0/131070389/2704080.pdf
    • http://files.badassgirlworld.com/uploads/1/3/2/6/132683142/dcd773fe8e66.pdf
    • http://files.creativeclayforall.co.uk/uploads/1/3/0/7/130739107/tamuxakowadegunutumi.pdf
    • https://cdn.shopify.com/s/files/1/0434/1055/5041/files/zanodixida.pdf
    • https://cdn.shopify.com/s/files/1/0431/2183/6193/files/75707672457.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/godukidizojiwovasekixu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1379/9066/files/62069454529.pdf
    • https://cdn.shopify.com/s/files/1/0431/4667/4336/files/97363347151.pdf
    • https://cdn.shopify.com/s/files/1/0432/2109/0471/files/torowonoponabarikutuzu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2606/2239/files/39989926559.pdf
    • https://cdn.shopify.com/s/files/1/0435/3510/6203/files/sopefopijotafenaxagoribu.pdf
    • https://cdn.shopify.com/s/files/1/0427/3537/0407/files/tuwagezijiwojerasif.pdf
    • https://cdn.shopify.com/s/files/1/0432/3885/0728/files/banevibasij.pdf
    • https://cdn.shopify.com/s/files/1/0430/3169/1421/files/dewelibolezedudu.pdf
    • https://cdn.shopify.com/s/files/1/0440/1466/5886/files/74136265303.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_off00006f18.bin
b33abf5e2108ee24466cc08954cecb588ddcafa642ff823dd878ffd4e570ad46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F18 5212 bytes
font_01_sfnt_off000080db.bin
7fafd54b32f03c8d5a7e7e234a15a335c7e1effb17f1cfec57bcee36bba85513		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80DB 11076 bytes

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