Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dc77afd2f2f1563…

MALICIOUS

PDF

43.8 KB Created: 2020-08-22 13:52:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a7aabf044ef29b43a6fb0f6b395fcd5 SHA-1: 3ebdd71f0b45c3244a1f1df816d2e5dbbfdb04a8 SHA-256: 8dc77afd2f2f156309bf467f66916a6a720e4ef74eddf11996b03ca888c0b4da
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=anti+allergy+bed+sheets'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to Shopify domains. The document body, though heavily obfuscated, contains the same redirector URL. The primary attack pattern involves luring the user to click on the malicious link, which then redirects to potentially harmful 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.com/pify?keyword=anti+allergy+bed+sheets
    • http://files.squarelakeassociation.com/uploads/1/3/2/6/132682913/morerokiv.pdf
    • http://fafolo.karencoynevolpe.com/uploads/1/3/2/6/132683289/fd4191284b57d71.pdf
    • http://files.marcscabs.com/uploads/1/3/0/9/130969211/fananopeli.pdf
    • https://cdn.shopify.com/s/files/1/0462/4823/1066/files/pufefiba.pdf
    • https://cdn.shopify.com/s/files/1/0431/8609/4248/files/17492470433.pdf
    • https://cdn.shopify.com/s/files/1/0428/3577/1558/files/29837305497.pdf
    • https://cdn.shopify.com/s/files/1/0433/7300/2906/files/44417467724.pdf
    • https://cdn.shopify.com/s/files/1/0431/3874/4469/files/stoner_john_williams_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/6954/6396/files/55052988278.pdf
    • https://cdn.shopify.com/s/files/1/0434/8978/8070/files/introduction_of_solid_state_physics.pdf
    • https://cdn.shopify.com/s/files/1/0432/6467/1909/files/gojinog.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fb3.bin
5e80dd4cda20b76af4e28fb90a2b19754da598e30dd6af1b867404818c1d8d6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB3 4996 bytes
font_01_sfnt_off00007095.bin
46e7e1c006c07c7d90ad60d543de0d3ae3a13e721ef224e085e22fd25ce41637		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7095 10464 bytes
font_02_sfnt_off00009456.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9456 4324 bytes

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