Malicious PDF — malware analysis report

Static analysis result for SHA-256 84f5cea9fbfc1f22…

MALICIOUS

PDF

37.7 KB Created: 2020-08-11 13:28:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c5929ad7bef594d945df545d2030c59 SHA-1: 02b25d7ec7b82aad5548c7baa6779051e138470c SHA-256: 84f5cea9fbfc1f22c27d5c2fdc93a02c90ab4e078acca8c6e8f351584d1f5d39
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=free+download+assamese+dictionary+pdf'. This URL is embedded within the document body, disguised as a free download lure. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on shopify.com, suggesting an attempt to distribute malicious content or engage in SEO poisoning. No scripts were extracted from this sample.

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.ru/pify?keyword=free+download+assamese+dictionary+pdf
    • http://files.heartyliving.co.uk/uploads/1/3/1/4/131454766/616995.pdf
    • http://files.mindfulness-et-sport.com/uploads/1/3/1/4/131483069/ziwew.pdf
    • https://cdn.shopify.com/s/files/1/0428/0143/0695/files/72595848903.pdf
    • https://cdn.shopify.com/s/files/1/0432/3213/3278/files/angular_5_documentation_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/9323/7665/files/jizaz.pdf
    • http://files.bmaj.rotherham.sch.uk/uploads/1/3/0/7/130740517/5197443.pdf
    • https://cdn.shopify.com/s/files/1/0429/1048/2591/files/test_file_download_http.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/68990802173.pdf
    • https://cdn.shopify.com/s/files/1/0429/3882/6918/files/gukeluviriwexig.pdf
    • https://cdn.shopify.com/s/files/1/0429/2381/9164/files/90857949698.pdf
    • https://cdn.shopify.com/s/files/1/0428/0382/2755/files/ripabaratitidege.pdf
    • https://cdn.shopify.com/s/files/1/0435/7016/7967/files/fb_auto_friend_request.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_off000055ef.bin
80c275f83b6091aa162a6ee2c0905affaedb442b2bfaa20b9013438fad06cf82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55EF 5448 bytes
font_01_sfnt_off0000687d.bin
8a7cc594af0adeaa52a34740fb4742ef2468cf88080f8d21bc103d92da4c1168		 pdf-font-stream PDF embedded font (sfnt) at offset 0x687D 9896 bytes

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