Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eea345a2f29fd67…

MALICIOUS

PDF

40.6 KB Created: 2020-09-04 13:45:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9f2c928ecc60a683cb9efe5d0452372 SHA-1: cd39c7db9c2161ac3b1d0d6e06ed6cb0e7def21c SHA-256: 3eea345a2f29fd67a98ae09a80aa28a57526f23d780284795b33286d3cb5de5e
150 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.me/pify?keyword=android+one+ui+1.+0'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF.

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.me/pify?keyword=android+one+ui+1.+0
    • https://cdn.shopify.com/s/files/1/0428/3206/8775/files/queen_s_gambit_theory.pdf
    • https://cdn.shopify.com/s/files/1/0447/5263/4005/files/247528387.pdf
    • https://cdn.shopify.com/s/files/1/0433/8617/5651/files/present_past_future_tense_words_list.pdf
    • https://cdn.shopify.com/s/files/1/0431/2901/2381/files/35703541737.pdf
    • https://static.usrfiles.com/ugd/79cb75_452a4f6d1b754278bb43c9888f5659dd.pdf
    • https://static.usrfiles.com/ugd/08fe48_eb101db1e8a64ed39fe4df3cd5bef30f.pdf
    • https://cdn.shopify.com/s/files/1/0430/5082/7929/files/zilirexiriturowaluzufuled.pdf
    • https://cdn.shopify.com/s/files/1/0429/1470/9663/files/29295669571.pdf
    • https://cdn.shopify.com/s/files/1/0450/8326/3141/files/49415459750.pdf
    • https://cdn.shopify.com/s/files/1/0431/1020/3556/files/4203370015.pdf
    • https://static.usrfiles.com/ugd/b8c837_485607fa1bea44d382d5768e76400283.pdf
    • https://static.usrfiles.com/ugd/455f95_0751951fd6444aa2bd7a52139998de7a.pdf
    • https://static.usrfiles.com/ugd/9e14ca_0c602c721e8e4324a7eda3d8d781d117.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_off000063f0.bin
f83c817ba4b24201f65c4ed11a42fb1195700b55f64e78b0bb3ceee1d6f64157		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63F0 4612 bytes
font_01_sfnt_off000073b8.bin
777b68382716b274a4bfd7cc0e263cfdd1b221f024efb5143f2f83b4ce0eca64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73B8 10064 bytes

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