Malicious PDF — malware analysis report

Static analysis result for SHA-256 da98d428a2b30fb0…

MALICIOUS

PDF

38.1 KB Created: 2020-08-25 01:54:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e31fcb54c3054d0822b6165f66711e2 SHA-1: 49616b1ff55079b9154b537f0bc5f82c45778ca6 SHA-256: da98d428a2b30fb09594893a93a8b410692067fa6c467b1fff9bacace2cd0a26
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with the primary link directing to a known malicious redirector. The document body, though heavily obfuscated, contains the same redirector URL. This suggests the PDF is designed to act as a lure, redirecting users 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.com/pify?keyword=html5+pdf+preview
    • http://vozixeji.gracestringfellow.com/uploads/1/3/1/4/131438405/e1f4d9.pdf
    • http://nedebef.treeexpertscincinnati.com/uploads/1/3/1/4/131438572/sesadi_luzopigaf.pdf
    • http://vifejadib.dropbucketmarketing.com/uploads/1/3/0/9/130969573/ccb8c40d.pdf
    • http://files.doug-mcfarland.com/uploads/1/3/0/7/130775516/bdf758a8a6.pdf
    • http://files.monctonhighschoolgrads.ca/uploads/1/3/2/6/132695734/fuzefima_kokifiwawebagi_dijalimaguzop_jedukadi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5086/8646/files/90217308762.pdf
    • https://cdn.shopify.com/s/files/1/0460/1688/8999/files/background_png_images_hd.pdf
    • https://cdn.shopify.com/s/files/1/0432/6352/5029/files/kupujixixilo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3799/8754/files/gememolotelugefisewuzavet.pdf
    • https://cdn.shopify.com/s/files/1/0432/5883/9198/files/check_your_english_vocabulary_for_banking_and_finance.pdf
    • https://cdn.shopify.com/s/files/1/0435/0869/5192/files/zenokewoxenixi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9003/5366/files/mutij.pdf
    • https://cdn.shopify.com/s/files/1/0438/8821/4171/files/2d_arrays_c.pdf
    • https://cdn.shopify.com/s/files/1/0435/9972/4703/files/86621875607.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_off000058f4.bin
fbec8588958cf32d17a3e27d05385f1f77011eec20041a56798af32b308cc999		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58F4 5036 bytes
font_01_sfnt_off00006a18.bin
91c741e6515184373bc5a71ea4c08e636857d9fe28c8cdb216d8e4cd690acb69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A18 9928 bytes

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