Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b36a622b4e4bb68…

MALICIOUS

PDF

48.0 KB Created: 2020-08-08 06:26:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 397842416f03c9fca12b706a7a420fa6 SHA-1: d3a32af20f923a7a250370e169cc90f250c3969a SHA-256: 0b36a622b4e4bb6853ac30abe358f314e02cc40db55d2100e67fbc948daf925f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to link farms and redirector infrastructure. The primary malicious URL identified is https://ttraff.cc/pify?keyword=psychology+topics+pdf, which is flagged as a known malicious redirector. The document's structure and content suggest it is designed to trick users into clicking these links, potentially leading to phishing pages or malware downloads.

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=psychology+topics+pdf
    • http://files.burstpublishing.com/uploads/1/3/0/8/130814065/wezevuwuve-kujawativov-weverakaxuke-xakatepikij.pdf
    • http://luxugame.tranbcreative.com/uploads/1/3/1/3/131383544/6348880.pdf
    • http://files.wnyccda.org/uploads/1/3/1/3/131383283/3391158.pdf
    • http://files.gethealthyknox.com/uploads/1/3/1/1/131163859/rosevesedosaj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/4519/1841/files/bosquejo_del_libro_de_romanos.pdf
    • https://cdn.shopify.com/s/files/1/0433/4832/8603/files/33632671077.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70474217151.pdf
    • https://cdn.shopify.com/s/files/1/0431/3235/4711/files/64759615539.pdf
    • https://cdn.shopify.com/s/files/1/0436/2086/0064/files/38746447131.pdf
    • https://cdn.shopify.com/s/files/1/0431/0230/6468/files/kaxokesexamaxetirukorowel.pdf
    • https://cdn.shopify.com/s/files/1/0434/9709/5333/files/raruwirubenuravod.pdf
    • https://cdn.shopify.com/s/files/1/0433/5173/6471/files/ni_no_kuni_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/7066/8453/files/vifid.pdf
    • https://cdn.shopify.com/s/files/1/0434/0888/3870/files/dezerarotu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0334/7097/files/lumiliwulajidedewis.pdf
    • https://cdn.shopify.com/s/files/1/0437/6500/6494/files/27123708966.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_off00007e23.bin
e73ebbf4ab9bcac3ddae8a56e80b6244c157ea9e332e869ebcf7e0e5591a70ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E23 5212 bytes
font_01_sfnt_off00008ff4.bin
6847547b6fe94b5fafc4c58211aceb4316910a44f0ca6729f79b6158554823c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FF4 10248 bytes

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