Malicious PDF — malware analysis report

Static analysis result for SHA-256 218655f16512b3f6…

MALICIOUS

PDF

38.6 KB Created: 2020-08-15 03:05:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e6ba18351ce2bb41ebca18058322513 SHA-1: 00804c8baddcd260b52523883f74cd30a63f95f6 SHA-256: 218655f16512b3f624d908af671aeaf03df05ab9cf0d25447f295a42498baff3
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a unit converter download. The document body and embedded URLs strongly suggest a social engineering lure to drive traffic to malicious infrastructure. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic firing confirms the malicious nature of the embedded URL, which leads to ttraff.com.

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.com/pify?keyword=unit+converter+free++for+pc
    • http://files.reecedaniel.com/uploads/1/3/1/8/131856725/aadabcd5d7a3.pdf
    • https://cdn.shopify.com/s/files/1/0431/1459/4464/files/78539540386.pdf
    • https://cdn.shopify.com/s/files/1/0428/8525/1235/files/2705416248.pdf
    • https://cdn.shopify.com/s/files/1/0430/7743/5556/files/fiwumuruvoramawujisurir.pdf
    • https://cdn.shopify.com/s/files/1/0435/9582/5320/files/pdf_file_merger_software_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/4571/4077/files/zelijinogibaxezude.pdf
    • https://cdn.shopify.com/s/files/1/0433/1143/1838/files/snl_drake_hotline_bling.pdf
    • https://cdn.shopify.com/s/files/1/0433/8250/5628/files/45070940433.pdf
    • https://cdn.shopify.com/s/files/1/0431/4244/7265/files/74641933023.pdf
    • https://cdn.shopify.com/s/files/1/0429/4167/7731/files/tovasojopo.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_off00005b32.bin
b600562ebf3e9c7e14f6f5943920186fdcf6e44fa8ae9f57864ac74ff51bc4bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B32 4640 bytes
font_01_sfnt_off00006b14.bin
4c5e48397fa2b26cf1f43776eba600b066c7e207518e0adef8355d0d87348960		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B14 10268 bytes

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