Malicious PDF — malware analysis report

Static analysis result for SHA-256 93279c581f26f4fd…

MALICIOUS

PDF

47.2 KB Created: 2020-08-22 13:32:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 747b715715ac62afbaf5af11d39fdafd SHA-1: d4692e953eaa3054e87768b7ca9c56d2bc16fd07 SHA-256: 93279c581f26f4fdf4819fd55b5e0e9eb65afb28945f8628c4a1b710d6b7d6c2
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious URL and keywords related to Android development, suggesting a lure to a malicious site. No scripts were extracted, and the primary malicious activity appears to be redirection via embedded links.

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=android+admob+banner+in+recyclerview
    • http://wezigovum.thenatureofthecosmos.com/uploads/1/3/1/4/131452841/tikeramefulim.pdf
    • http://jolusibam.rivercitygivers.com/uploads/1/3/0/8/130874388/b3ea954e2.pdf
    • https://cdn.shopify.com/s/files/1/0431/3264/9636/files/31833226499.pdf
    • https://cdn.shopify.com/s/files/1/0434/0452/5720/files/76071736071.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96951977507.pdf
    • https://cdn.shopify.com/s/files/1/0434/3486/8897/files/56601829496.pdf
    • https://cdn.shopify.com/s/files/1/0435/6728/4387/files/minecraft_fortune_pickaxe.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/wings_and_rings_menu.pdf
    • https://cdn.shopify.com/s/files/1/0440/6142/5814/files/75513027643.pdf
    • https://cdn.shopify.com/s/files/1/0428/9226/3583/files/23798780632.pdf
    • https://cdn.shopify.com/s/files/1/0431/5735/6695/files/wumupanofadozinipore.pdf
    • https://cdn.shopify.com/s/files/1/0431/0797/5335/files/seguwita.pdf
    • https://cdn.shopify.com/s/files/1/0437/9174/5185/files/kumigesamobinufunixarix.pdf
    • https://cdn.shopify.com/s/files/1/0430/4742/0066/files/92684585724.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_off00006e21.bin
55f8f06eb5603eff84055c6675a5c6e1186d801d6e69f47663c3f1b293b79187		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E21 5292 bytes
font_01_sfnt_off0000801b.bin
ec5e2bd27f958fea481da6a094c9a4e0bd3a9cea228ae601ed72d7b4006b61ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x801B 14640 bytes

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