Malicious PDF — malware analysis report

Static analysis result for SHA-256 53c8325ce58e9db7…

MALICIOUS

PDF

40.3 KB Created: 2020-09-02 16:12:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e4cdcadf498afd42ac2d7fe0dbec11e SHA-1: b304e38f17538df12a01c3266323fb433cf8cac3 SHA-256: 53c8325ce58e9db79eb0a002efdf5a56276a3bdb06daad665b74c7541802de9e
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/wix?keyword=android+google+calendar+add+outlook+account', is designed to redirect users to potentially harmful content. The document also contains a large number of embedded links, many hosted on Shopify, which is flagged as a PDF link farm. The overall purpose appears to be social engineering to trick users into clicking the malicious redirector.

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/wix?keyword=android+google+calendar+add+outlook+account
    • https://cdn.shopify.com/s/files/1/0431/7003/7917/files/naroganufexeberabitofetis.pdf
    • https://cdn.shopify.com/s/files/1/0433/2018/0894/files/11513334623.pdf
    • https://cdn.shopify.com/s/files/1/0434/6091/9462/files/fofipure.pdf
    • https://static.usrfiles.com/ugd/badafb_8cf27530845b48359dd2e793c5861ad6.pdf
    • https://cdn.shopify.com/s/files/1/0428/0716/5095/files/86929752107.pdf
    • https://cdn.shopify.com/s/files/1/0440/2610/1925/files/android_studio_pull_project_from_github.pdf
    • https://cdn.shopify.com/s/files/1/0435/8553/6159/files/nomafegedo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3881/0023/files/semoxafumunofawawikafu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2222/8379/files/foxelifutitogudufivut.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/romiket.pdf
    • https://cdn.shopify.com/s/files/1/0437/6271/2728/files/adjectives_for_describing_personality_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/8176/8872/files/eric_meyer_css_reset.pdf
    • https://cdn.shopify.com/s/files/1/0430/6285/3794/files/raduzuzepufojanuzabirimuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/3260/8921/files/summertime_saga_apk_for_android_4.2.2.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_off00006122.bin
a4b7d216fa93199ba5ae437c777c73968cd5aa49e8007b2423f253a86a493076		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6122 4980 bytes
font_01_sfnt_off00007223.bin
b957efcda91869069dbc5b22b38aa221050e23b81ba1e4841b33b79749ad42e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7223 9988 bytes

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