Malicious PDF — malware analysis report

Static analysis result for SHA-256 4112dce67513e8ce…

MALICIOUS

PDF

42.1 KB Created: 2020-08-25 07:06:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8fc8fa7a3f91bbf7d868d2ebb0a96a53 SHA-1: 92785111dac0217464df9d375677a7fd4e417d17 SHA-256: 4112dce67513e8ceaa53ace99ce2f77b9f6c5f78c97bb46b0ae2c5b4ccf9bf17
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. This redirector is disguised with a keyword related to an online game, suggesting a lure to entice users to click. The PDF itself contains garbled text and metadata indicating it was generated by wkhtmltopdf, a tool often used to create malicious PDFs.

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=herbalism+leveling+guide+wowhead
    • http://files.kobefeelingdolls.com/uploads/1/3/1/3/131381612/1158609.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/wepuvegemetarebotav.pdf
    • https://cdn.shopify.com/s/files/1/0431/8111/3506/files/11023521728.pdf
    • https://cdn.shopify.com/s/files/1/0428/6296/8991/files/ajax_download_file.pdf
    • https://cdn.shopify.com/s/files/1/0436/9793/0393/files/disanalamiribubukivepe.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/6655293143.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wanojexabe.pdf
    • https://cdn.shopify.com/s/files/1/0429/1143/2867/files/third_grade_master_spelling_list.pdf
    • https://cdn.shopify.com/s/files/1/0430/5515/3303/files/19318047737.pdf
    • https://cdn.shopify.com/s/files/1/0437/6264/7191/files/smt750i_apc_smart_ups_750va_lcd_230v.pdf
    • https://cdn.shopify.com/s/files/1/0446/7235/2419/files/bacaan_yasin_dan_tahlil_latin.pdf
    • https://cdn.shopify.com/s/files/1/0429/9004/3287/files/gulumexikitulurifibe.pdf
    • https://cdn.shopify.com/s/files/1/0431/9051/7917/files/format_of_consolidated_balance_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0437/6661/2130/files/fimupe.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_off0000674a.bin
da4223a5ed6f91a70cacefe0f85c1c877c905c0cb534f3343d977c7b82938445		 pdf-font-stream PDF embedded font (sfnt) at offset 0x674A 5492 bytes
font_01_sfnt_off000079cf.bin
f5ed7c63386baf4d845d26aa5a97254d85c61f78341fd4d2065d45ce1af1c643		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79CF 9900 bytes

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