Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5d2b69cfb104aa2…

MALICIOUS

PDF

49.3 KB Created: 2020-09-30 00:26:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 025be195c02d7cac2517a539b5f00410 SHA-1: d50e180351c7670cf8543b8afff9ac7ea2c6ddc8 SHA-256: f5d2b69cfb104aa28dae7ac6d1a8b551b9575bf89a4de07e900111e2e656b631
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, identified by the PDF_SEO_LINK_FARM heuristic. One of these links, https://ggtraff.ru/mozel?keyword=different+types+of+testing+in+software+engineering+pdf, is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains garbled text along with some of the URLs, suggesting it's designed to host a link farm rather than provide readable 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://ggtraff.ru/mozel?keyword=different+types+of+testing+in+software+engineering+pdf
    • https://site-1036941.mozfiles.com/files/1036941/botefadenemif.pdf
    • https://site-1036680.mozfiles.com/files/1036680/vekozu.pdf
    • https://site-1036630.mozfiles.com/files/1036630/46540850136.pdf
    • https://site-1037283.mozfiles.com/files/1037283/jutiwatajokemulo.pdf
    • https://site-1036754.mozfiles.com/files/1036754/65327582718.pdf
    • http://munudaweb.hughesenveng.com/uploads/1/3/0/7/130775990/dakegotojo.pdf
    • http://rulaxozok.americaimproving.com/uploads/1/3/0/7/130776180/2051118.pdf
    • http://tubibew.47secretstoayoungeryou.com/uploads/1/3/1/3/131379655/netovet-kusupaf-lapetuxufurez.pdf
    • http://vasapa.vitalnutritioncapecod.com/uploads/1/3/1/4/131406717/kesobenul-gifadijem.pdf
    • http://liviwi.mjstocksinvesting.com/uploads/1/3/0/7/130739431/lazulopabaran_regad_livepex.pdf
    • http://pusojigal.pianomanlarryhunt.com/uploads/1/3/0/7/130775971/wisuzogukoxax-vakef-vixetasogis-dobivu.pdf
    • http://xezipej.thesummitclearfork.com/uploads/1/3/2/6/132683071/dafunukidatewi.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_off00008336.bin
179ba3a160685d4a7878c2f5391970c9932bf24a640b7e63272b96d4ba01d911		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8336 5368 bytes
font_01_sfnt_off000095ac.bin
621f1c94161cff92009e15a0c0c58d52d6c40daecc709b2867f60eb19eb51dbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95AC 10020 bytes

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