Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbea44e4673b379d…

MALICIOUS

PDF

49.7 KB Created: 2020-08-17 02:44:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86b4e384481960fe964ff2e215a370da SHA-1: 448d4cb2955e9fb4b181a9cdfdc7f5fe093ae5b4 SHA-256: cbea44e4673b379dca592d363c05ec430bc27115b9178fc3fc8f43996a4480fd
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=dysmenorrhea+guidelines+2016'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the same redirector URL, suggesting the primary intent is to redirect the user to malicious infrastructure.

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=dysmenorrhea+guidelines+2016
    • http://files.missinginamericaproductions.net/uploads/1/3/0/7/130740056/roxaduvanopamizun.pdf
    • http://vokareta.westerauchrawcroft.com/uploads/1/3/0/7/130775310/jomasuredogepibeje.pdf
    • https://cdn.shopify.com/s/files/1/0433/8096/5534/files/76874466864.pdf
    • https://cdn.shopify.com/s/files/1/0433/8332/4822/files/form_fits_function.pdf
    • https://cdn.shopify.com/s/files/1/0440/5864/0534/files/mojapedaritiw.pdf
    • https://cdn.shopify.com/s/files/1/0431/4529/8077/files/blank_white_paper.pdf
    • https://cdn.shopify.com/s/files/1/0446/6756/8291/files/modern_chemistry_textbook_answers_page_86.pdf
    • https://cdn.shopify.com/s/files/1/0434/4345/4102/files/44156796282.pdf
    • https://cdn.shopify.com/s/files/1/0431/7570/6788/files/fexakosased.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/tumasedutivaxaminaleja.pdf
    • https://cdn.shopify.com/s/files/1/0434/6393/4109/files/66480332178.pdf
    • https://cdn.shopify.com/s/files/1/0434/5122/0134/files/contemplated_change_notice.pdf
    • https://cdn.shopify.com/s/files/1/0430/8071/2346/files/present_tense_practice.pdf
    • https://cdn.shopify.com/s/files/1/0435/2344/0799/files/94627493656.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_off0000801a.bin
0b9d5e04e37aafcdb2802fafa5a2319cb95b6fd16ed9f1ff5cf7d8bc9365caed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x801A 5820 bytes
font_01_sfnt_off000093c1.bin
31e2d331ccb22b8e3d7983622cb8073d1dcdcb7afa7d3e7bb4a28da451454363		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93C1 11620 bytes

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