Malicious PDF — malware analysis report

Static analysis result for SHA-256 21d95bd088d65562…

MALICIOUS

PDF

48.5 KB Created: 2020-08-13 23:41:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7434827e457657becdbc6865778dbbdd SHA-1: 303c6012520b4dfe920562462aaf250d640b44c2 SHA-256: 21d95bd088d6556261063fd2d6183677440fddd7cc81a5b538e8e00ebf5c78d8
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=back+stretches+handout+pdf', which is also listed as a malicious redirector. The presence of numerous links to Shopify, many of which are likely part of a link farm, further supports a malicious intent to lure users to external, potentially harmful, content.

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=back+stretches+handout+pdf
    • http://files.encourageministrywomenny.org/uploads/1/3/0/9/130969211/kapoliro.pdf
    • http://files.ggbarry.com/uploads/1/3/0/9/130969551/xemexizalexow.pdf
    • http://mirulima.commerceelementarypta.com/uploads/1/3/0/8/130814411/zajinusek-bapez-dadifisegazoras-wukatikux.pdf
    • https://cdn.shopify.com/s/files/1/0431/7075/8816/files/65270333742.pdf
    • https://cdn.shopify.com/s/files/1/0432/3350/9534/files/vojemug.pdf
    • https://cdn.shopify.com/s/files/1/0435/5312/8612/files/59899494585.pdf
    • https://cdn.shopify.com/s/files/1/0428/9894/8255/files/jixak.pdf
    • https://cdn.shopify.com/s/files/1/0428/5156/5724/files/50510530202.pdf
    • https://cdn.shopify.com/s/files/1/0433/8250/5628/files/76287615346.pdf
    • https://cdn.shopify.com/s/files/1/0435/5178/5109/files/11912997405.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/bubirimumajagefa.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/erving_goffman_asylums.pdf
    • https://cdn.shopify.com/s/files/1/0433/8266/9464/files/zelenebatuxikobose.pdf
    • https://cdn.shopify.com/s/files/1/0433/4046/4281/files/ffxv_guide.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_off000072f8.bin
604fcbab7a968627a4a4e6146d30dea5dd6d666a8203f1a34eb64c3f67424c78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72F8 5156 bytes
font_01_sfnt_off0000846b.bin
5888317dd0742f267241ee9d9e86f559a906f03a988e790b04237ad7c998a528		 pdf-font-stream PDF embedded font (sfnt) at offset 0x846B 10120 bytes
font_02_sfnt_off0000a717.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA717 4324 bytes

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