Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcd9eac1c6d30652…

MALICIOUS

PDF

39.5 KB Created: 2020-08-25 01:24:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e6e83035b4f804d4c0f7abe8dfa4b8f SHA-1: d8cfef177dd4e2d8cfbb44586f239573ce68c366 SHA-256: bcd9eac1c6d30652880dd0d4692ededdd3b5a2065293948b5fd5a53e8b7bbe12
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, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=android+apps+not+installed+after+reboot', is designed to redirect users to potentially harmful content. The file also exhibits characteristics of a link farm, with numerous external PDF links, suggesting an attempt to manipulate search engine results or distribute further malicious content. The primary attack pattern involves social engineering through a deceptive document title to encourage link clicks.

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=android+apps+not+installed+after+reboot
    • http://files.ccevenice.com/uploads/1/3/1/0/131070291/ccf226.pdf
    • http://sador.cjbmaed.com/uploads/1/3/0/7/130739777/pixamokizek_kogaxakogili_vomadebedi_durudenenejegav.pdf
    • https://cdn.shopify.com/s/files/1/0432/7748/4196/files/avast_registration_key.pdf
    • https://cdn.shopify.com/s/files/1/0460/4008/8740/files/khandeshi_video_song_2018.pdf
    • https://cdn.shopify.com/s/files/1/0429/0641/9367/files/lm741_datasheet_gain_bandwidth_product.pdf
    • https://cdn.shopify.com/s/files/1/0435/1849/2824/files/44302770499.pdf
    • https://cdn.shopify.com/s/files/1/0439/7072/3998/files/designing_your_life_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0448/4582/6210/files/luzikiwegijeropifuse.pdf
    • https://cdn.shopify.com/s/files/1/0429/1841/2451/files/digital_image_processing_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/8987/9445/files/bokefubunomafajip.pdf
    • https://cdn.shopify.com/s/files/1/0461/9108/3670/files/85847839468.pdf
    • https://cdn.shopify.com/s/files/1/0429/0691/0876/files/categorical_imperative_ethics.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_off00005b94.bin
5846580b322c934c3e893d32f367c628010c71f1882d6584cb0a0782f661ce03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B94 5164 bytes
font_01_sfnt_off00006d28.bin
c9f205e0469b08d6f626add2862e5bf551b500d5e2d82c202e98694bbe13bd96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D28 10580 bytes

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