Malicious PDF — malware analysis report

Static analysis result for SHA-256 4af404f708262496…

MALICIOUS

PDF

40.3 KB Created: 2020-08-15 03:52:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52a078f476c3421e54c83f752d175ece SHA-1: 703a3be8dd24e9c0d9638b02adbbaa23f8b8412e SHA-256: 4af404f7082624965336fcb4690dd0ab62bc46eddb1f76445c8d6f182b157c87
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for redirecting users to malicious sites. One critical heuristic identified a link to a known malicious redirector, ttraff.com. The document body, though partially corrupted, contains text related to 'Movimiento parabolico ejercicios pdf' and the authoring application 'wkhtmltopdf', suggesting a lure to disguise the malicious intent. The presence of a link farm further supports the malicious nature of the document.

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/wb?keyword=movimiento%20parabolico%20ejercicios%20pdf
    • http://files.kortarsmuveszet.com/uploads/1/3/1/8/131856664/vimaretanizig.pdf
    • http://files.klayworks.com/uploads/1/3/1/4/131437087/damew.pdf
    • http://files.transcendedministries.org/uploads/1/3/0/9/130969242/firiped.pdf
    • https://cdn.shopify.com/s/files/1/0439/2851/8824/files/83062731345.pdf
    • https://cdn.shopify.com/s/files/1/0430/3365/7498/files/vawiwetax.pdf
    • https://cdn.shopify.com/s/files/1/0437/6857/8210/files/79911396912.pdf
    • https://cdn.shopify.com/s/files/1/0433/4164/3928/files/43630710882.pdf
    • https://cdn.shopify.com/s/files/1/0429/5308/0991/files/pejiwabenefa.pdf
    • https://cdn.shopify.com/s/files/1/0432/2826/6654/files/18602200230.pdf
    • https://cdn.shopify.com/s/files/1/0431/1659/3312/files/ludebiwanonolaru.pdf
    • https://cdn.shopify.com/s/files/1/0430/3287/1074/files/usps_change_of_address_form_printable.pdf
    • https://cdn.shopify.com/s/files/1/0430/4614/2114/files/vavidaxafefuzijozub.pdf
    • https://cdn.shopify.com/s/files/1/0429/2988/1244/files/mipisav.pdf
    • https://cdn.shopify.com/s/files/1/0431/0525/5577/files/44577477866.pdf
    • https://cdn.shopify.com/s/files/1/0435/3284/5207/files/32867874599.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_off00005d83.bin
69e2806a52f5102c3cebdc0f0e5c1a61877a47585cac4df12bdc0a6f0042827b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D83 5584 bytes
font_01_sfnt_off00007069.bin
f4a3970ed9a90f6914fec1f28640c3fa84087842cab4aac964de480df278fa78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7069 10504 bytes

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