Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3cf786aa73b8be3…

MALICIOUS

PDF

37.3 KB Created: 2020-08-21 10:32:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 066d7e8aad3e03ce65381df3609a8264 SHA-1: 25c096b2c82643d6db38ad63cce8eb7a0e2d774b SHA-256: f3cf786aa73b8be3a4762a61a3f480be2fba75b7a5e1e765dc85e5b840becf2e
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=footer+word+template'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to obscure the malicious destination. No scripts were extracted, but the embedded URLs and the nature of the PDF heuristics strongly suggest a social engineering lure.

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=footer+word+template
    • http://joxonid.byptrampolines.com/uploads/1/3/1/3/131379730/6427354.pdf
    • http://files.cannonurology.com/uploads/1/3/2/7/132710624/rimewexala_bizivub_nafudonigaxi_luxalufonu.pdf
    • http://files.charlesvoysey.com/uploads/1/3/1/1/131163780/c8c99f7a04ea2c4.pdf
    • http://files.nickmonsters.com/uploads/1/3/0/8/130874679/tewowiw_nitawebulifu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5317/9289/files/26377289788.pdf
    • https://cdn.shopify.com/s/files/1/0435/4139/7656/files/what_happened_to_the_ancient_library_of_alexandria.pdf
    • https://cdn.shopify.com/s/files/1/0434/5485/7369/files/woletelevilomogo.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/bekesiwizolibokojoba.pdf
    • https://cdn.shopify.com/s/files/1/0431/3110/9538/files/kijefibawomiwirikid.pdf
    • https://cdn.shopify.com/s/files/1/0431/5725/8401/files/wobagotejoludavororam.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57355052908.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_off000055a1.bin
d272a2a38ec3e82da3e86c35f53767a05f9f15c056827e30dbbfd70b09c000f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55A1 4972 bytes
font_01_sfnt_off00006686.bin
11d5ade43adfb4ab16c2b4653ec2c2373ee81beb54ad47c269b677a38b2005b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6686 10056 bytes

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