Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ba3571b0cfd7d9c…

MALICIOUS

PDF

37.3 KB Created: 2020-08-24 07:08:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a58078130c9ed7cd51cd27813ffcc5f SHA-1: d7125675845450839e500ed799e79572c722cdda SHA-256: 2ba3571b0cfd7d9c901abb9ec967ce7bdce2a30d00c04b83060dae16f47e78b3
150 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, disguised as a motor insurance proposal form. The document also features a link farm, with many external PDF links, likely for SEO manipulation to improve search engine ranking for malicious content. The ML classifier strongly indicated maliciousness.

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=motor+insurance+proposal+form
    • http://jasave.gettingnailed.co.uk/uploads/1/3/1/6/131636727/53ffa.pdf
    • http://mibunoka.timbertheft.org/uploads/1/3/0/7/130775364/8218921.pdf
    • http://files.wilbrahamprimary.com/uploads/1/3/0/9/130969768/pesizu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6499/9588/files/windows_movie_maker_2012_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0434/0832/6812/files/kogesifi.pdf
    • https://cdn.shopify.com/s/files/1/0430/5354/7677/files/tozumukisupomizoduj.pdf
    • https://cdn.shopify.com/s/files/1/0433/5271/9515/files/revosa.pdf
    • https://cdn.shopify.com/s/files/1/0431/4356/1384/files/duzatatunokegazele.pdf
    • https://cdn.shopify.com/s/files/1/0432/2351/5300/files/iosh_risk_assessment_form.pdf
    • https://cdn.shopify.com/s/files/1/0435/2638/9912/files/15229460593.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_off00005598.bin
71d205b8ac68f9a8e1634eb05fa50d046057b3d68c16213ed843d7d2243e591b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5598 5168 bytes
font_01_sfnt_off0000671c.bin
5e412e777257a3253090301b8f8b19e35e60c2e766ffdab42adca701e672987a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x671C 9884 bytes

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