Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d3cc066f3d7b7d6…

MALICIOUS

PDF

43.7 KB Created: 2020-07-21 02:39:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9beefb2dd55d587d8f98db5089ba99e4 SHA-1: 61026d348f31561ba7422816a877f2302c546c2b SHA-256: 0d3cc066f3d7b7d61221922f250078732c2e3b1b9c043d3278fbdb881c261ef3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with the primary redirector pointing to a known malicious domain. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, and the PDF_SEO_LINK_FARM heuristic indicates a large number of external links were generated. The ML_NYX_PDF_MALICIOUS score further supports the malicious classification.

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.com/wb?keyword=percepcion%20auditiva%20psicologia%20pdf
    • http://files.eyelightdesign.com.au/uploads/1/3/1/4/131437472/44bfe02eaa6.pdf
    • http://files.hillandstump.com/uploads/1/3/2/7/132740270/8730535.pdf
    • http://files.madisonbizreview.com/uploads/1/3/2/6/132696029/5809701.pdf
    • http://files.punksurfboards.com/uploads/1/3/2/7/132740499/5a954847dc.pdf
    • http://files.motownrocks.com/uploads/1/3/2/6/132695200/mumiz_sagetetujos.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/4371/5229/files/86313800274.pdf
    • https://cdn.shopify.com/s/files/1/0431/4673/9878/files/tepusepu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8306/2678/files/23637716601.pdf
    • https://cdn.shopify.com/s/files/1/0428/6211/7020/files/gerebudelatifemujep.pdf
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/40264938340.pdf
    • https://rejinam.files.wordpress.com/2020/07/sobeva.pdf
    • https://biwejutidaxo.files.wordpress.com/2020/06/37516421373.pdf
    • https://fezutizo750736143.files.wordpress.com/2020/07/53863375943.pdf
    • https://bisogupawike.files.wordpress.com/2020/06/xipazuw.pdf
    • https://cdn.shopify.com/s/files/1/0433/1126/7990/files/pevugufox.pdf
    • https://cdn.shopify.com/s/files/1/0431/3019/2039/files/94467237594.pdf
    • https://cdn.shopify.com/s/files/1/0432/6568/7717/files/53004633991.pdf
    • https://cdn.shopify.com/s/files/1/0438/0118/2370/files/xakovarisisimad.pdf
    • https://cdn.shopify.com/s/files/1/0430/3713/0914/files/52051574159.pdf
    • https://cdn.shopify.com/s/files/1/0436/1981/1490/files/54682996549.pdf
    • https://cdn.shopify.com/s/files/1/0434/2756/1634/files/99735915719.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_off00006ca0.bin
677e44fe3ef6c0c2efb49c9af7717a4fa77fd3036878675b12f7f81ef9f5172d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA0 5264 bytes
font_01_sfnt_off00007e8a.bin
c8168fbda9e4abf967412c39627db7e3ea23fc7a9a8c96603be44bf2c6665337		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E8A 10488 bytes

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