Malicious PDF — malware analysis report

Static analysis result for SHA-256 3271782cfec792a3…

MALICIOUS

PDF

47.5 KB Created: 2020-08-19 06:05:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68b69397e9ed55de7b0ae17eb72e2f83 SHA-1: b9d8462155d57bf640482d403dea4e5ded702f44 SHA-256: 3271782cfec792a3b18b9c712a52e3caa5b5744d6e160ee6f319e971a5130fd8
120 Risk Score

Malware Insights

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

The PDF file contains a lure related to a 'dictionary english to gujarati for mobile' and embeds numerous links. One of these links, 'https://ttraff.ru/pify?keyword=dictionary+english+to+gujarati+for+mobile', is identified as a malicious redirector. The document also functions as a link farm, directing users to 24 other PDF files, many hosted on Shopify. This suggests a phishing or redirection attack aimed at users seeking language tools.

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=dictionary+english+to+gujarati+for+mobile
    • http://files.rusticedenphotos.com/uploads/1/3/0/7/130739398/91bb7b561.pdf
    • http://files.kevisixth.com/uploads/1/3/1/0/131071063/revomodikevajed-roputi-galukobiw.pdf
    • http://files.zebradental.co.uk/uploads/1/3/1/6/131636828/aa5ff0f.pdf
    • https://cdn.shopify.com/s/files/1/0435/0928/5024/files/steam_download_stats.pdf
    • https://cdn.shopify.com/s/files/1/0429/3492/7513/files/phonics_race_1.pdf
    • https://cdn.shopify.com/s/files/1/0429/6956/3290/files/33112399695.pdf
    • https://cdn.shopify.com/s/files/1/0434/7310/9152/files/92805729625.pdf
    • https://cdn.shopify.com/s/files/1/0435/9743/0941/files/square_root_of_98_in_decimal_form.pdf
    • https://cdn.shopify.com/s/files/1/0439/8625/6030/files/zegax.pdf
    • https://cdn.shopify.com/s/files/1/0428/5536/6822/files/atharvashirsha_ganpati_stotra.pdf
    • https://cdn.shopify.com/s/files/1/0433/8984/5667/files/aruba_controller_7005_firmware.pdf
    • https://cdn.shopify.com/s/files/1/0433/9659/5861/files/64845437530.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_off000079e2.bin
d0e65e2fd3b47fd8b31d3abed6ce76bfa2fb928109056b66bc3821c1daa8a87c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79E2 5612 bytes
font_01_sfnt_off00008cdc.bin
8f4d46271fd8690222e87b655e71d446cce59c8d36a7a93478734e6d11485a3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CDC 10608 bytes

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