Malicious PDF — malware analysis report

Static analysis result for SHA-256 e25974d8484b2ce0…

MALICIOUS

PDF

54.0 KB Created: 2020-08-23 11:19:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7039a4a07f241efc5f6927f65f78462 SHA-1: d42b853f38560f02403ab3059963c29f79a3a794 SHA-256: e25974d8484b2ce04818e8060f2e9ec53e511975897afafa7046cbed934c6a4d
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL and references 'logarithm problems and answers pdf', suggesting a lure. The PDF also features a link farm heuristic, indicating a large number of external links, many hosted on Shopify. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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=logarithm+problems+and+answers+pdf
    • http://files.oldmanfreakboy.com/uploads/1/3/0/7/130776416/buwuwazoniwekik.pdf
    • http://files.fully-cooked.com/uploads/1/3/0/8/130814644/gokotivizefojo.pdf
    • http://files.nestonhockey.co.uk/uploads/1/3/0/7/130738881/gasawujasawujisal.pdf
    • http://pisusij.bluegoosequilts.com/uploads/1/3/2/6/132682076/4948456.pdf
    • https://cdn.shopify.com/s/files/1/0429/5501/4297/files/sonixapetibedikajuver.pdf
    • https://cdn.shopify.com/s/files/1/0440/2734/7109/files/nuduvavojibidoj.pdf
    • https://cdn.shopify.com/s/files/1/0430/4306/1909/files/gatiranimewikarisigofol.pdf
    • https://cdn.shopify.com/s/files/1/0440/3573/5717/files/kijepimafetasivag.pdf
    • https://cdn.shopify.com/s/files/1/0438/6163/9318/files/gcse_circuit_symbols.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xizijifopaxefiz.pdf
    • https://cdn.shopify.com/s/files/1/0435/3120/6808/files/lujejodosoradumumobunutu.pdf
    • https://cdn.shopify.com/s/files/1/0434/8870/6717/files/rupaxubalipuvakomekefo.pdf
    • https://cdn.shopify.com/s/files/1/0440/9376/7832/files/adverbial_clause_of_concession.pdf
    • https://cdn.shopify.com/s/files/1/0430/8205/5842/files/how_to_delete_branch_on_github.pdf
    • https://cdn.shopify.com/s/files/1/0428/5782/4419/files/fidapadafelopekizufaso.pdf
    • https://cdn.shopify.com/s/files/1/0434/3640/8982/files/govazepiperogutowugofit.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_off0000772c.bin
83dd1a8c1e83225477d02f45dd0109621f4e9f98e627d22288598e8e16268b36
pdf-font-stream PDF embedded font (sfnt) at offset 0x772C 5628 bytes
font_01_sfnt_off00008a3e.bin
4db7d9c07132bbd1cfd3efced082f7298c911381ce57a69a7d9f7b5552bd9c72
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A3E 13560 bytes
font_02_sfnt_off0000b57e.bin
95f2a8319533f051e584a9e2aa38e8d42f7eb419abe795cf0dce2d6390e2c0a0
pdf-font-stream PDF embedded font (sfnt) at offset 0xB57E 16204 bytes