Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c837dfa01b59757…

MALICIOUS

PDF

36.9 KB Created: 2020-08-18 23:08:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc84ff595e2db363cd5f205f5ca36de2 SHA-1: 0102397468f02b3cb903ef61ee562f1ac87a1649 SHA-256: 7c837dfa01b59757cdb4d73403f089d61465ca7178ec9f60aae8c15ee6b70d07
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a link farm and a redirector URL, indicating a likely attempt to lead users to malicious content. The document body, though obfuscated, contains text related to a weather report, suggesting a lure to encourage clicks. The ML classifier also strongly flagged this PDF as malicious.

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=odisha+live+weather+report
    • http://files.kjdfreelance.com/uploads/1/3/1/3/131382274/557740.pdf
    • http://kowuloju.elizabethgracedavisdesigns.com/uploads/1/3/0/8/130813117/patazufozaf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/4638/7362/files/58357027966.pdf
    • https://cdn.shopify.com/s/files/1/0432/4065/2960/files/safari_web_browser_for_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0430/7373/2768/files/wopimunorovexukolibemu.pdf
    • https://cdn.shopify.com/s/files/1/0434/8706/8322/files/93528684906.pdf
    • https://cdn.shopify.com/s/files/1/0429/2873/4367/files/8929333859.pdf
    • https://cdn.shopify.com/s/files/1/0433/8135/8759/files/66292765569.pdf
    • https://cdn.shopify.com/s/files/1/0431/5932/2773/files/75102080615.pdf
    • https://cdn.shopify.com/s/files/1/0430/4220/9945/files/remove_nox_hotbar.pdf
    • https://cdn.shopify.com/s/files/1/0433/7244/5854/files/foxariwukuma.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_off000053ea.bin
66823e1e0047ae735165f4939f015ff895bb5fa5f2042ebe243195e65e419029		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53EA 5224 bytes
font_01_sfnt_off000065bd.bin
a2876ce29bd3e858dbbef87c74aeb4acdd7e2bc8baa0ae3d8a805e8d4329b7d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65BD 9752 bytes

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