Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0673693946f9a76…

MALICIOUS

PDF

47.9 KB Created: 2020-07-07 11:09:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aae1bb524233b032dc191d4c00aab606 SHA-1: d593e235ea7ddf3d487165c33a9860d22e0edfc6 SHA-256: e0673693946f9a76e21a9d21a6711ab292bf01829bbc82df2df3d27e467e31a5
150 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, forming a link farm designed to redirect users to malicious content. The primary redirector URL is https://ttraff.ru/wb?keyword=manorama%20weekly%20free%20pdf#manorama+weekly+free+pdf, which is flagged as malicious. The document body, though heavily obfuscated, contains references to the same redirector and appears to be a lure for free PDF content. The heuristic firings strongly indicate malicious redirection and link farm activity.

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.ru/wb?keyword=manorama%20weekly%20free%20pdf#manorama+weekly+free+pdf
    • http://files.rathfrilandmotorclub.co.uk/uploads/1/3/2/3/132302913/zomawuzivoludi_petusol_mufawukemur_xitedelufukojob.pdf
    • http://files.seetheworld.tours/uploads/1/3/2/8/132815961/bawifutopite.pdf
    • http://files.merarifernandez.com/uploads/1/3/1/4/131407165/6839308.pdf
    • http://files.allfloorsinteriors.com/uploads/1/3/0/9/130969375/kexajize.pdf
    • http://files.sandaharrboerboels.com/uploads/1/3/2/6/132681566/6896535.pdf
    • http://files.minilivestock.com/uploads/1/3/2/7/132740415/38a223c.pdf
    • http://files.just-verandas.com/uploads/1/3/1/3/131379045/xobuxisedujus_wekabod.pdf
    • http://files.comforttrainer.net/uploads/1/3/2/6/132681002/4312007.pdf
    • http://files.antoniodavidsinopoli.com/uploads/1/3/0/8/130873907/4090271.pdf
    • http://files.mpowertheworld.net/uploads/1/3/2/7/132740415/kadisetiwebuget_rofajanagojata.pdf
    • http://files.thecovenantschristandyou.com/uploads/1/3/1/3/131379434/94345039.pdf
    • https://viwedibi
    • https://meleteriz.files.wordpress.com/2020/06/56305019742.pdf
    • https://notetel.files.wordpress.com/2020/06/netax.pdf
    • https://viwedibimu.files.wordpress.com/2020/07/23007408526.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_off00007b7f.bin
482490ca88d01e48c8e3f664994aa6d71e4d80972944dce0e53b0aa17d37aef7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B7F 4932 bytes
font_01_sfnt_off00008c3f.bin
55e97abe047ff882196768c8fafb4cd65b30ef8d778ccf42fcf6654583200c26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C3F 11440 bytes

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