Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa681f3c57eec44f…

MALICIOUS

PDF

36.1 KB Created: 2020-08-14 22:04:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02eb588ad44cf64cb3ceb618fd8c70da SHA-1: dd9ffa09ef9c7e2d4c11d8bcfc7248283c3b0049 SHA-256: fa681f3c57eec44f0ebcc082f2ca5e6db37ad480ac3c3f27fc4e15112ffda518
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded URLs, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that the primary link leads to known malicious infrastructure. The 'PDF_SEO_LINK_FARM' heuristic further suggests that the document is designed to host a large number of external links, likely for SEO manipulation or to distribute 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.cc/wb?keyword=free%20punctuation%20worksheets%20for%20kindergarten
    • http://jelej.karoricemeterytour.com/uploads/1/3/0/7/130739695/81b8c39c.pdf
    • http://files.daccontracts.com/uploads/1/3/1/4/131408928/dojagarin-pudopi.pdf
    • http://files.carrithefilingfairy.com/uploads/1/3/1/4/131438658/9718251.pdf
    • http://vepivel.priscillecanivet.com/uploads/1/3/1/8/131857054/ed5e15.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37394074323.pdf
    • https://cdn.shopify.com/s/files/1/0432/4468/3419/files/honda_hrx217_shop_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/2802/9345/files/zezizajezalurodusakixoxap.pdf
    • https://cdn.shopify.com/s/files/1/0430/2585/8723/files/gutux.pdf
    • https://cdn.shopify.com/s/files/1/0438/3883/2800/files/parks_and_rec_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0431/5018/0503/files/tokenilaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/2596/4949/files/84704653236.pdf
    • https://cdn.shopify.com/s/files/1/0447/0390/7993/files/99997135922.pdf
    • https://cdn.shopify.com/s/files/1/0434/0508/2780/files/gaporitufosugeni.pdf
    • https://cdn.shopify.com/s/files/1/0432/2846/3271/files/cricut_user_manual.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_off00004dc1.bin
e6e7df2f98ef152316ba796ac9d49119b0f25b62b479fb77709e48d6c223e80c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DC1 5496 bytes
font_01_sfnt_off00006080.bin
d9290aa4c554da99445171b044e177754ce9bf88a5bd0edae39c448f551df387		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6080 10188 bytes

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