Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce04ddf175c53e90…

MALICIOUS

PDF

45.0 KB Created: 2020-08-17 02:02:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c6c520f4516bea56e15d6468e6ffc26 SHA-1: 8e38a46f728ebbd43baff7757287571f199e5b88 SHA-256: ce04ddf175c53e90478115a4fb5bb05f0b30b9b30950fddff1ebe563b5e0b14f
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, specifically pointing to 'https://ttraff.com/pify?keyword=calendar+for+september+2019+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The document body, though heavily obfuscated, contains references to 'calendar for september 2019 pdf' and the wkhtmltopdf tool, suggesting a lure for users searching for such content. The presence of numerous external PDF links, many hosted on Shopify, further supports the link farm tactic.

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=calendar+for+september+2019+pdf
    • http://files.highlandheightscoc.net/uploads/1/3/0/9/130969370/f834f462a582.pdf
    • http://files.bradscoachingacademy.com/uploads/1/3/1/4/131407164/6848558.pdf
    • http://files.bethannysbabies.com/uploads/1/3/0/8/130813904/javabifesesizese.pdf
    • http://dogevexi.national-ds.com/uploads/1/3/1/3/131384260/1040836.pdf
    • http://files.nathalychicas.com/uploads/1/3/1/4/131452836/fa6095e46ef60.pdf
    • https://cdn.shopify.com/s/files/1/0436/9596/4328/files/74088908400.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2675/files/global_variable_in_c.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4878/files/aptitude_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0436/2177/7570/files/35732380484.pdf
    • https://cdn.shopify.com/s/files/1/0433/9066/4860/files/dabivixuvige.pdf
    • https://cdn.shopify.com/s/files/1/0431/2802/9345/files/how_to_hold_cells_in_google_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/0625/4504/files/daxulusopa.pdf
    • https://cdn.shopify.com/s/files/1/0432/0316/6370/files/sogawegajimuxenukavufob.pdf
    • https://cdn.shopify.com/s/files/1/0433/0219/1269/files/navpers_1336_3.pdf
    • https://cdn.shopify.com/s/files/1/0428/0310/1863/files/xogapidesofesasasaziru.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_off0000625d.bin
64ba0443be0b1e04020a59c9197741059d49d37d7813aa84624bcb323955576c
pdf-font-stream PDF embedded font (sfnt) at offset 0x625D 5572 bytes
font_01_sfnt_off0000752f.bin
90b938d7e1cdd11578ae39350066249b6ed2aba9ef8b0ea54cd48669a6c53377
pdf-font-stream PDF embedded font (sfnt) at offset 0x752F 10612 bytes
font_02_sfnt_off00009914.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x9914 4324 bytes