Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef591aa9225f4b8b…

MALICIOUS

PDF

44.6 KB Created: 2020-08-28 03:18:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7681141eededfbc7ddbc07b64e02ee6 SHA-1: 96002cfd2421bcea67b973c282a924b4d4b2eb35 SHA-256: ef591aa9225f4b8be88de6dce3b0f205411e8b08f72bd7f6994881695b3a8373
150 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector URL, disguised as a manual. The primary malicious URL is https://ttraff.cc/pify?keyword=deltec+calcium+reactor+manual, which likely leads to further malicious content. The ML classifier strongly indicated maliciousness, and the presence of numerous external links suggests a tactic to distribute malicious content or engage in SEO manipulation for malicious purposes.

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/pify?keyword=deltec+calcium+reactor+manual
    • http://mifon.dc3cares.org/uploads/1/3/1/3/131398008/kapuku.pdf
    • http://files.ifindoubttravel.com/uploads/1/3/1/4/131437515/xifepirelu.pdf
    • http://fovefo.bethelchurchipm.com/uploads/1/3/0/9/130969723/9331744.pdf
    • http://tiluwami.plateauvalleyanimalhospital.com/uploads/1/3/0/9/130969627/b893b.pdf
    • http://sobula.elevateyc.org/uploads/1/3/1/4/131438137/rorunuximaga_vamoteroruxim_wiwepupobera.pdf
    • https://cdn.shopify.com/s/files/1/0435/4985/1811/files/53002699905.pdf
    • https://cdn.shopify.com/s/files/1/0437/6012/4061/files/81708976570.pdf
    • https://cdn.shopify.com/s/files/1/0431/5181/8903/files/manual_for_behringer_x32_compact.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/venepodewigatod.pdf
    • https://cdn.shopify.com/s/files/1/0429/7513/3859/files/nojomevowarunuxet.pdf
    • https://cdn.shopify.com/s/files/1/0434/1111/2092/files/23529043316.pdf
    • https://cdn.shopify.com/s/files/1/0433/1054/7099/files/econometrics_exam_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0130/6526/files/juwujojawidaxitufifusuro.pdf
    • https://cdn.shopify.com/s/files/1/0433/9033/7189/files/6030265318.pdf
    • https://cdn.shopify.com/s/files/1/0431/8874/8452/files/alien_shooter_2_reloaded_free.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_off0000746e.bin
2c96cf62a12fb2a8388979fe54a12e5d7b73c5ba5597454d32569d5b66c0d991		 pdf-font-stream PDF embedded font (sfnt) at offset 0x746E 4764 bytes
font_01_sfnt_off00008488.bin
edff4e7467c957c81a725d41d75f45cc7cfabab92e30877e99509cf36d15ba5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8488 9720 bytes

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