Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ad3c29693fe62f7…

MALICIOUS

PDF

37.1 KB Created: 2020-08-19 17:55:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: beb0b86fc5f5f9a147fa1e0fb9ff08b7 SHA-1: 0156283621217fd68f0f47fcb4c05eca2cd3ac41 SHA-256: 3ad3c29693fe62f7c4a29597211b8d3c8229c30ebd844ef3dae9477985119f6c
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many pointing to Shopify-hosted PDF files, which is indicative of a link farm. One of the primary links directs to a known malicious redirector, ttraff.cc. This suggests the document is part of a campaign to distribute malicious content or manipulate search results. No scripts were extracted, and the document body is largely unreadable binary data, but the heuristic firings strongly indicate malicious intent through URL redirection.

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.cc/pify?keyword=barton+mainsheet+blocks
    • http://vukasefap.super-sounds.com/uploads/1/3/0/9/130969280/4124705.pdf
    • https://cdn.shopify.com/s/files/1/0437/3417/1813/files/94935387978.pdf
    • https://cdn.shopify.com/s/files/1/0437/5933/7621/files/rikilonaxiwuzorab.pdf
    • https://cdn.shopify.com/s/files/1/0433/1533/1227/files/bounce_dryer_sheets_200_count.pdf
    • https://cdn.shopify.com/s/files/1/0428/6382/0959/files/bosidenega.pdf
    • https://cdn.shopify.com/s/files/1/0435/8776/4387/files/bekavikenej.pdf
    • https://cdn.shopify.com/s/files/1/0438/7019/1771/files/3709936899.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xakikalimakimoxe.pdf
    • https://cdn.shopify.com/s/files/1/0437/1028/3931/files/fukotififulolezo.pdf
    • https://cdn.shopify.com/s/files/1/0438/2969/0528/files/watuxadexezixiguwozod.pdf
    • https://cdn.shopify.com/s/files/1/0428/7509/3159/files/74255685726.pdf
    • https://cdn.shopify.com/s/files/1/0428/3337/9487/files/36421572844.pdf
    • https://cdn.shopify.com/s/files/1/0431/8851/9076/files/tisedun.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_off00004ca2.bin
df86015a1ac719443abf72d5365e3dc961472c2495ea2b922d047d463d37b425		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CA2 5292 bytes
font_01_sfnt_off00005e6c.bin
aded5d18df92769785c79579b1059c8328d89b6c02be02d78fcd2f1b4643b68c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E6C 13220 bytes

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