Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f0853eb42d7b977…

MALICIOUS

PDF

56.4 KB Created: 2020-08-26 12:14:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bed848c6a02a4fd85b345d5464369630 SHA-1: d078ae250e1128d856764490c51c1307633c6586 SHA-256: 3f0853eb42d7b977bdb42e44d3229c257ed10baac5626bc3ec1de48a1248c7b3
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=etica+de+urgencia+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent.

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=etica+de+urgencia+pdf
    • http://files.johnnyaircargopadala.com/uploads/1/3/1/8/131856949/xaxezefozesepos-libuxanowes-divuwelotekedup.pdf
    • http://files.susankain.com/uploads/1/3/2/6/132683087/7202268.pdf
    • http://nisatori.crestfallentheatre.com/uploads/1/3/0/8/130813403/laponefedilu.pdf
    • http://goleji.annawitte.org/uploads/1/3/0/7/130776367/48aa61.pdf
    • http://files.villapenelope.net/uploads/1/3/1/6/131607110/tixapafupu-japoxeres-tutolivefoj.pdf
    • https://cdn.shopify.com/s/files/1/0429/3555/0111/files/wufemupilowakugituduk.pdf
    • https://cdn.shopify.com/s/files/1/0432/3750/7240/files/faremonenixuke.pdf
    • https://cdn.shopify.com/s/files/1/0431/9887/3762/files/dedibejukakekiri.pdf
    • https://cdn.shopify.com/s/files/1/0434/0344/4380/files/cardiomiopatia_alcoholica.pdf
    • https://cdn.shopify.com/s/files/1/0435/2652/0986/files/b._ed_exam_form_2018_rdvv.pdf
    • https://cdn.shopify.com/s/files/1/0434/2834/8056/files/warobigogi.pdf
    • https://cdn.shopify.com/s/files/1/0437/1264/3223/files/excel_cheat_sheet_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/9702/1854/files/19119531443.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_off00009d48.bin
59217908b6643017ace75eb556e061e20b0ddc0566a8adaa5f6631d7b4a29d0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D48 5068 bytes
font_01_sfnt_off0000ae8e.bin
7aa53e68ce99100789af35154007847a38bad795f72e573c0d61ce4815e183b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE8E 11540 bytes

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