Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd1c477c8a6bf51e…

MALICIOUS

PDF

44.9 KB Created: 2020-08-18 17:19:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9edb292604958327f1a40155684f2b03 SHA-1: e3269cea58d94305c80d9fd09e001c1914b56a79 SHA-256: dd1c477c8a6bf51e925eb05df8a901ccbb81c864c6d64d32d88a778b88cac4f6
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, suggesting a link farm or SEO abuse tactic. One of the embedded URLs, 'https://ttraff.com/pify?keyword=bagan+self+guided+tour', is identified as a known malicious redirector. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body contained mostly garbled text and metadata, making it difficult to ascertain a specific user-facing lure beyond the presence of numerous links.

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=bagan+self+guided+tour
    • http://jozode.mquinn.online/uploads/1/3/1/3/131384605/tobujezeji.pdf
    • http://files.newhavenpanhel.org/uploads/1/3/0/7/130739533/859dec44.pdf
    • http://figadej.paparazzibuster.com/uploads/1/3/2/6/132681481/6769311.pdf
    • http://mefem.alisonpeters.net/uploads/1/3/2/3/132303035/denow.pdf
    • http://laben.lcaclassicalhistory.com/uploads/1/3/2/8/132814930/8d7d5.pdf
    • https://cdn.shopify.com/s/files/1/0429/5399/8502/files/chm_format_linux.pdf
    • https://cdn.shopify.com/s/files/1/0435/2311/3119/files/quizlet_gravity_hack.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/different_types_of_cells_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0448/9232/3995/files/understanding_renewable_energy_systems.pdf
    • https://cdn.shopify.com/s/files/1/0433/9191/0038/files/faulty_comparison_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0439/7400/0798/files/jizolagerogaguwujeral.pdf
    • https://cdn.shopify.com/s/files/1/0440/2076/0741/files/42595158229.pdf
    • https://cdn.shopify.com/s/files/1/0429/5730/8063/files/eglantine_school_report.pdf
    • https://cdn.shopify.com/s/files/1/0438/6340/8795/files/silent_letters_in_english_words_list.pdf
    • https://cdn.shopify.com/s/files/1/0431/6063/3504/files/24732016109.pdf
    • https://cdn.shopify.com/s/files/1/0429/6055/2085/files/82230962515.pdf
    • https://cdn.shopify.com/s/files/1/0427/9504/0924/files/34290434248.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_off00007244.bin
3c437aedfaacb5fcd01a75a3f0ebaf51d8ee8a4b185189b2033225af8f2698cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x7244 5124 bytes
font_01_sfnt_off000083bf.bin
feb7a9d12dfb4ae2bd88f9ea2facb80c65a025694ce261e08b0a328653341c46
pdf-font-stream PDF embedded font (sfnt) at offset 0x83BF 10248 bytes