Malicious PDF — malware analysis report

Static analysis result for SHA-256 c523911bda27f276…

MALICIOUS

PDF

61.3 KB Created: 2020-08-11 15:47:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92ed2d1acff9655af1659fe374dea388 SHA-1: 90ee3e19f69a07db9e3ff76f916f51f81b4ee38d SHA-256: c523911bda27f276af947ba300b9629f6419e342a4e682dc438ae4aaa7aa85d8
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=campylobacter+fetus+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The document body, though heavily obfuscated, contains the same redirector URL. This suggests the primary purpose is to lure the user to a malicious site.

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=campylobacter+fetus+pdf
    • http://fajebu.bac4training.com/uploads/1/3/0/9/130968996/3834a7bf135.pdf
    • http://files.asburycropfarm.org/uploads/1/3/2/7/132740763/pagewep.pdf
    • http://files.ptofarmington.org/uploads/1/3/1/6/131606951/xafana_kasuwowanegatar.pdf
    • http://domizi.blockchain-real.at/uploads/1/3/1/3/131380183/6174912.pdf
    • http://files.braxtonwinegarner.com/uploads/1/3/0/8/130813546/7486792.pdf
    • https://cdn.shopify.com/s/files/1/0431/6309/1112/files/57502427439.pdf
    • https://cdn.shopify.com/s/files/1/0434/6304/9376/files/kikuvaferut.pdf
    • https://cdn.shopify.com/s/files/1/0439/3431/8760/files/mifibifusegisaripufaw.pdf
    • https://cdn.shopify.com/s/files/1/0435/7187/1912/files/fewegovejokegavazofaba.pdf
    • https://cdn.shopify.com/s/files/1/0440/4350/1733/files/fenuxejig.pdf
    • https://cdn.shopify.com/s/files/1/0433/4931/1646/files/lanagobekalikowipi.pdf
    • https://cdn.shopify.com/s/files/1/0429/0389/6230/files/konefipuxavonavukuzuzal.pdf
    • https://cdn.shopify.com/s/files/1/0428/8095/8617/files/98105549388.pdf
    • https://cdn.shopify.com/s/files/1/0435/3730/1653/files/baboviguvigijofabi.pdf
    • https://cdn.shopify.com/s/files/1/0437/6304/0408/files/detailed_road_map_of_australia.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_off0000b2d7.bin
273ced88a6a39e46428d530d04bb5aeb5345221962de8c00676c65e902c7d71f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB2D7 5448 bytes
font_01_sfnt_off0000c54b.bin
98ae1f34ebe21bea46dbad834481ad2e138e64ae3a79e35ba1100b5464be6f10		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC54B 10208 bytes

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