Malicious PDF — malware analysis report

Static analysis result for SHA-256 0015bc603d7d2027…

MALICIOUS

PDF

51.6 KB Created: 2020-08-02 08:49:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e8b89222404789990c4c7b93cd5f5dd SHA-1: 266dec3c9b11b7a6278aa4ab18c65bd7049ed455 SHA-256: 0015bc603d7d2027a091ba3a91db419fdaab7a30623592cc8d261596c80931ba
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, https://ttraff.cc/pify?keyword=power+of+attorney+forms+ma, which is designed to lead users to further malicious content. The document also hosts a large number of links to other PDFs, suggesting a link farm for SEO poisoning or traffic redirection. The ML classifier strongly indicated maliciousness, supporting the observed malicious link behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/pify?keyword=power+of+attorney+forms+ma
    • http://files.elevatedaccounting.com/uploads/1/3/1/4/131408170/dawudamodajumij.pdf
    • http://files.seraphimschool.com/uploads/1/3/0/9/130968906/vepenosobukebowi.pdf
    • http://files.depressionwillfade.com/uploads/1/3/0/7/130739379/dopukasoko.pdf
    • http://files.pinkturtledesigns.co.uk/uploads/1/3/0/7/130775747/ba76087889d42.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3926/8774/files/xozevizipuralujojorarero.pdf
    • https://cdn.shopify.com/s/files/1/0433/4957/3784/files/49878245296.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/voriwatovetizejewadodo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3590/1602/files/febufuwopijuwifatokel.pdf
    • https://cdn.shopify.com/s/files/1/0432/7908/9824/files/42745120324.pdf
    • https://cdn.shopify.com/s/files/1/0433/6753/0657/files/wadanonorixewajirapaxub.pdf
    • https://cdn.shopify.com/s/files/1/0432/7460/0598/files/vunufizejopirilil.pdf
    • https://cdn.shopify.com/s/files/1/0435/7590/2363/files/bijotal.pdf
    • https://cdn.shopify.com/s/files/1/0433/5311/2735/files/sekuxorokubukidelatuj.pdf
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/99817604862.pdf
    • https://cdn.shopify.com/s/files/1/0432/5359/6324/files/dumatuxuwadapotilape.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75130531250.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008d6d.bin
59c771922685968ff971c88582341642f77974040fcc6f3978b3eca21dda4254		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D6D 5076 bytes
font_01_sfnt_off00009eb0.bin
6f604313fc561b4dd2418a780919f16cb9c8ff4575e8433b714e35c1eb86341e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EB0 10144 bytes

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