Malicious PDF — malware analysis report

Static analysis result for SHA-256 30409d4bf87a31e7…

MALICIOUS

PDF

41.6 KB Created: 2020-08-01 06:45:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a420ab176b136ff7ec0010a60a2edc30 SHA-1: 7afe6e5651e1f4f35f6d19b382c164178a7745a8 SHA-256: 30409d4bf87a31e7f792a8b8a604377df3f0b39f1ac866a16a4b4f2ba98c8a62
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'https://ttraff.ru/pify?keyword=chaos+tunnels+osrs'. This indicates a likely attempt to manipulate search engine results or redirect users to malicious content. The ML classifier also strongly flagged this PDF as malicious.

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.ru/pify?keyword=chaos+tunnels+osrs
    • http://files.padillalawpractice.com/uploads/1/3/0/7/130739274/dafidudimufinuw.pdf
    • http://files.jacquevilmainmusic.com/uploads/1/3/0/9/130969655/1201643.pdf
    • http://files.plushunltd.com/uploads/1/3/0/8/130873930/kunifebulinozusorob.pdf
    • http://files.thiefshow.com/uploads/1/3/1/8/131856326/tobuvajudob.pdf
    • https://cdn.shopify.com/s/files/1/0433/3184/6296/files/jekebuvuroruri.pdf
    • https://cdn.shopify.com/s/files/1/0434/0809/7436/files/9334308949.pdf
    • https://cdn.shopify.com/s/files/1/0432/3406/6594/files/14719340807.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/tagadelakezaxunim.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/vilivev.pdf
    • https://cdn.shopify.com/s/files/1/0431/2442/4853/files/49295423032.pdf
    • https://cdn.shopify.com/s/files/1/0428/4055/5676/files/wexazugi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4364/2773/files/lonozulaxufukopuduse.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xarapidarobumebavo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1771/5361/files/milolijazuvefedebufenuru.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pekazojifedabefotekufof.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_off000067e7.bin
501c1ed950ea5b75fe0800dcc5c75db7efd88185ed15798b309e9f1903749c0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67E7 4680 bytes
font_01_sfnt_off000077bb.bin
09b8af4ca3278754b0ffa4f02dde19484fe4230c30ff7af21a61448cf6e11ea5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77BB 9984 bytes

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