Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab28d1cde894a679…

MALICIOUS

PDF

44.3 KB Created: 2020-08-29 07:15:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 429c2b6446fb06e118b19ca7fc5e3b6a SHA-1: 71836f2f4df3c66e89937cc6a84a05f0353ce3ca SHA-256: ab28d1cde894a679cdefeaddef9b7c4f6733d3393940cb9ec213f65061680d42
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL and a lure related to watching movies online. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further malicious 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.ru/wix?keyword=watch+floating+skyscrapers+online+free
    • https://cdn.shopify.com/s/files/1/0438/9899/4856/files/rixuli.pdf
    • https://cdn.shopify.com/s/files/1/0439/9936/3222/files/74067289609.pdf
    • https://cdn.shopify.com/s/files/1/0431/5512/8477/files/deduxukagotabuwisatagas.pdf
    • https://static.usrfiles.com/ugd/b8c837_5a2a32c4edec44e8b0af498f39596da7.pdf
    • https://static.usrfiles.com/ugd/b8c837_dcb736365cfd43b3b88edad5c6de1288.pdf
    • https://cdn.shopify.com/s/files/1/0428/4959/9654/files/57381542899.pdf
    • https://cdn.shopify.com/s/files/1/0435/2658/6527/files/67051842156.pdf
    • https://cdn.shopify.com/s/files/1/0436/9888/0680/files/lot_s_wife_anna_akhmatova.pdf
    • https://cdn.shopify.com/s/files/1/0435/5411/1656/files/sailor_moon_manga_latino_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0438/8156/2280/files/41193296514.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56751463133.pdf
    • https://cdn.shopify.com/s/files/1/0441/4416/5016/files/7225657955.pdf
    • https://cdn.shopify.com/s/files/1/0434/3208/3612/files/bloodborne_wooden_shield.pdf
    • https://cdn.shopify.com/s/files/1/0431/4827/9957/files/9298401741.pdf
    • https://cdn.shopify.com/s/files/1/0431/7573/9560/files/58184537865.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_off000064df.bin
50480a0f72bf601db2e0f961509d79953efbfdb1dc18a8ee969a0fc4d4612d67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64DF 5456 bytes
font_01_sfnt_off0000777b.bin
c327e0f92b290be872be82076bd46687069b3b99f5013ea000a651d3dc0e4050		 pdf-font-stream PDF embedded font (sfnt) at offset 0x777B 14636 bytes

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