Malicious PDF — malware analysis report

Static analysis result for SHA-256 c243403d0edb7d7e…

MALICIOUS

PDF

37.6 KB Created: 2020-07-31 22:56:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 947c3973ff64af915ecd9042e701daac SHA-1: d30cf20b4b8c290401141085d13b709cf88b1139 SHA-256: c243403d0edb7d7e1d45dcb5bb2ae643b033f9087232fdecf5793f5c280ed2fd
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, identified as a link farm, with one prominent link pointing to a known malicious redirector. The document body text, though partially corrupted, includes the URL 'https://ttraff.ru/pify?keyword=call+me+lyrics+blondie', suggesting a lure to disguise the malicious intent. The primary goal appears to be directing users to potentially harmful external content through this extensive link farm.

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=call+me+lyrics+blondie
    • http://files.ucclatrobe.org/uploads/1/3/0/7/130739970/tetado.pdf
    • http://files.kopou.org/uploads/1/3/2/7/132712661/4f862ddfc137.pdf
    • http://files.vaweather.net/uploads/1/3/1/3/131381693/5037237.pdf
    • http://files.summertimeaussies.com/uploads/1/3/1/4/131438069/dfa0e62357b7.pdf
    • http://files.dreadzilla.com/uploads/1/3/0/7/130775400/norokakuzid-fefigexonopekum.pdf
    • https://cdn.shopify.com/s/files/1/0429/3351/8489/files/27438711813.pdf
    • https://cdn.shopify.com/s/files/1/0434/1828/8284/files/xezajotugidapadesek.pdf
    • https://cdn.shopify.com/s/files/1/0429/1438/1980/files/25982417526.pdf
    • https://cdn.shopify.com/s/files/1/0430/7602/6522/files/63273467519.pdf
    • https://cdn.shopify.com/s/files/1/0435/4641/1167/files/zaxetojuvonamefizu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7220/0608/files/jebarinedujowikewarari.pdf
    • https://cdn.shopify.com/s/files/1/0435/2681/5895/files/26443172747.pdf
    • https://cdn.shopify.com/s/files/1/0430/6354/1917/files/ranugir.pdf
    • https://cdn.shopify.com/s/files/1/0429/0864/7580/files/kekelejujowewatu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/93527538138.pdf
    • https://cdn.shopify.com/s/files/1/0429/6353/3977/files/26750360223.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004998.bin
27a848503ece089aee18b66183b0030be61dc1e1c0d38ecf8cc5332ca67d4d40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4998 5060 bytes
font_01_sfnt_off00005aa3.bin
0fb2975bf03c52fd11f41e7ac4d1bc5af7cc683cf01cee90eb34ec0595ed9111		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AA3 9604 bytes
font_02_sfnt_off00007b71.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B71 4324 bytes

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