Malicious PDF — malware analysis report

Static analysis result for SHA-256 c57407dea841e516…

MALICIOUS

PDF

38.5 KB Created: 2020-08-22 09:10:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b004d9a05177d674d97435a04fc4cbb SHA-1: 4b22e0806928fcfaaa6c029d97c1ba296e441071 SHA-256: c57407dea841e516e83804711cb06f87d99f3c74248535d53150032f4b6483f7
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, pointing to 'https://ttraff.cc/pify?keyword=adductor+pollicis+manual+muscle+test'. This URL is likely used to redirect users to a malicious site. The document also exhibits characteristics of a link farm, with numerous embedded URLs, including one hosted on 'mydhfastmandat.com', which is flagged as unknown reputation. The document body itself is heavily obfuscated and contains the malicious URL, suggesting an attempt to disguise its true 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.cc/pify?keyword=adductor+pollicis+manual+muscle+test
    • http://files.mydhfastmandat.com/uploads/1/3/0/7/130776590/e44ce2e9.pdf
    • https://cdn.shopify.com/s/files/1/0430/0275/7281/files/73460358209.pdf
    • https://cdn.shopify.com/s/files/1/0435/3464/7460/files/generally_accepted_accounting_principles_with_examples.pdf
    • https://cdn.shopify.com/s/files/1/0434/7455/0950/files/bungee_font_mac.pdf
    • https://cdn.shopify.com/s/files/1/0437/4485/4165/files/26062946759.pdf
    • https://cdn.shopify.com/s/files/1/0428/3210/1543/files/40113787117.pdf
    • https://cdn.shopify.com/s/files/1/0440/8072/6168/files/60385916363.pdf
    • https://cdn.shopify.com/s/files/1/0428/8030/3270/files/pusejunutav.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65529241957.pdf
    • https://cdn.shopify.com/s/files/1/0433/2588/2520/files/8716892052.pdf
    • https://cdn.shopify.com/s/files/1/0440/7584/3736/files/libro_medical_career_paths.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_off000059e3.bin
61a158ce91c91133677cfa0cc409325e843641df067fcebec99b626f502a11e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59E3 5208 bytes
font_01_sfnt_off00006b73.bin
80dd48f52a23cced0208351b5167da289cf39330ac1b926d5d2083e600c09002		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B73 9940 bytes

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