Malicious PDF — malware analysis report

Static analysis result for SHA-256 adfa2cb8a9a32e01…

MALICIOUS

PDF

40.1 KB Created: 2020-08-29 06:03:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c404ef23ebf8c012760ccc17e88f5c9b SHA-1: eb38249101689b929d8f72a2df35e0be98d91aee SHA-256: adfa2cb8a9a32e01609e0c54ae8e14059f6c7ea2750da1e3c7cad559f27abb68
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 'static.usrfiles.com'. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be luring the user to click on the malicious link within the document.

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/wix?keyword=il-2+sturmovik+battle+of+kuban
    • https://static.usrfiles.com/ugd/b8c837_99a9288ce96f40d980a479911dd46ed6.pdf
    • https://static.usrfiles.com/ugd/b8c837_32af411ec13b4b5586ca4b5e2a8b5380.pdf
    • https://static.usrfiles.com/ugd/b8c837_762c991ad3ae411daa45a39b55d58654.pdf
    • https://static.usrfiles.com/ugd/b8c837_538721c2a6c542a3807f4fcdeba1b002.pdf
    • https://static.usrfiles.com/ugd/b8c837_3bb6c7c4032f4a908242df1326e1584f.pdf
    • https://static.usrfiles.com/ugd/b8c837_cce7a4f23653497ebb1e0607be8b4cf1.pdf
    • https://static.usrfiles.com/ugd/b8c837_8bc87731a82d48708873da3b9bc1b9ed.pdf
    • https://static.usrfiles.com/ugd/b8c837_0f2dbd3b8701473b8612224cda78fa8c.pdf
    • https://cdn.shopify.com/s/files/1/0434/1248/8348/files/border_song_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0431/7229/8918/files/76183966284.pdf
    • https://cdn.shopify.com/s/files/1/0431/0892/5600/files/compendium_of_the_catechism_of_the_catholic_church_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/2313/7957/files/38104687960.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_off00005d1e.bin
fbf06bfe87e62f3b12864f0d8d73deae226cc3927723887edfd752a0ab487b76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D1E 5276 bytes
font_01_sfnt_off00006f06.bin
449b9eeee7fef9edcb05f16184777fd83ff0046465657bc678755d3192f78dd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F06 10992 bytes

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