Malicious PDF — malware analysis report

Static analysis result for SHA-256 b79013d1c8b30db6…

MALICIOUS

PDF

42.9 KB Created: 2020-08-10 01:12:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b73148e2572c9010d6aaafdd3d4a8167 SHA-1: 24024353bd4009b210980616e7eab1bb94cdf902 SHA-256: b79013d1c8b30db6e5975588353f73f97a95b9870e3f21388e9983ed3216447d
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 pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to Shopify domains. The document body, though heavily obfuscated, contains the target URL and references to 'wkhtmltopdf', suggesting it was generated programmatically to appear as a legitimate document. The primary intent appears to be redirecting the user to malicious infrastructure.

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=marriage+d+amour+piano+sheet+pdf
    • http://files.thechurchwithamission.com/uploads/1/3/2/7/132740692/zixowaxedul_busopimotem_padige.pdf
    • http://files.sydneyayurvedacentre.com/uploads/1/3/1/6/131606431/c1280c7ad3b.pdf
    • http://files.moldingconfidentme.net/uploads/1/3/1/8/131857916/1abc042f.pdf
    • https://cdn.shopify.com/s/files/1/0431/9651/4461/files/tunakodavowakaremixumom.pdf
    • https://cdn.shopify.com/s/files/1/0429/4973/8650/files/nubusitapuji.pdf
    • https://cdn.shopify.com/s/files/1/0429/2172/2015/files/biwerelovevufej.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0830/files/dutegaletujitemes.pdf
    • https://cdn.shopify.com/s/files/1/0435/0522/1784/files/88177193406.pdf
    • https://cdn.shopify.com/s/files/1/0438/4541/9173/files/42226379731.pdf
    • https://cdn.shopify.com/s/files/1/0429/2637/5071/files/the_flash_s03e09_vodlocker.pdf
    • https://cdn.shopify.com/s/files/1/0439/0954/6136/files/88500835855.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gimuwuwizarisatin.pdf
    • https://cdn.shopify.com/s/files/1/0432/5765/9547/files/bifuzov.pdf
    • https://cdn.shopify.com/s/files/1/0428/7509/3159/files/5078921153.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_off00005b86.bin
e55e16d98d066178821b4ae1ed8512e5c24558bf457dbc2ecf47292f6b532db6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B86 5428 bytes
font_01_sfnt_off00006dde.bin
e1760c2b0e4dfebe903cd335e1a0ddf25c47bb964c0fb769c1e759e7b1c8dd3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DDE 15064 bytes

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