Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ddfe6036ed80b97…

MALICIOUS

PDF

42.7 KB Created: 2020-08-21 01:01:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f9d3e263cfcff7d22f2112b1da49dc7 SHA-1: fe5039b65b50a249e2e2a2a58a99054440a4ec3d SHA-256: 3ddfe6036ed80b972d42a0af9e31fc0217f51d5789f54684f7188007c7c27309
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.ru. Additionally, it exhibits characteristics of a PDF SEO link farm, embedding numerous external links, many hosted on cdn.shopify.com. The ML classifier also strongly flagged this PDF as malicious. The document body contains garbled text but includes the malicious URL, suggesting the primary intent is to lure the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=carbamoyl+chloride+formation
    • http://files.mrsstuenckel.com/uploads/1/3/1/8/131871644/tukewiwusemix-nipefuzinitek-naxebefe.pdf
    • http://jimiw.mosherministries.com/uploads/1/3/1/4/131437850/31395b88.pdf
    • https://cdn.shopify.com/s/files/1/0437/6385/9610/files/27332155301.pdf
    • https://cdn.shopify.com/s/files/1/0434/2956/0481/files/mizojakis.pdf
    • https://cdn.shopify.com/s/files/1/0428/8551/3379/files/86014156771.pdf
    • https://cdn.shopify.com/s/files/1/0438/2208/8354/files/nasalipojiganeroj.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/jexomumizidifagozelesam.pdf
    • https://cdn.shopify.com/s/files/1/0432/7912/2587/files/dell_deminsion_3000_specs.pdf
    • https://cdn.shopify.com/s/files/1/0440/6630/8246/files/free_training_certificate_templates_for_word.pdf
    • https://cdn.shopify.com/s/files/1/0429/4115/3439/files/read_incest_comics_online.pdf
    • https://cdn.shopify.com/s/files/1/0432/4281/5643/files/99559168748.pdf
    • https://cdn.shopify.com/s/files/1/0433/0012/6880/files/wubivogumogumebilatazat.pdf
    • https://cdn.shopify.com/s/files/1/0434/1828/8277/files/65921616422.pdf
    • https://cdn.shopify.com/s/files/1/0434/2795/4854/files/riverside_food_handlers_card.pdf
    • https://cdn.shopify.com/s/files/1/0431/5391/6053/files/49507229069.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_off00006931.bin
7c95dcdabf76bd864a0095b5172972f6868568a8bcd339fb1728d2d2234120c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6931 5228 bytes
font_01_sfnt_off00007ad9.bin
245d8290701fd9e4d3f9daafb5a62710d0c1e4f20378fa22cf632f27c3430ada		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD9 10404 bytes

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