Malicious PDF — malware analysis report

Static analysis result for SHA-256 64cb84d742303101…

MALICIOUS

PDF

42.3 KB Created: 2020-07-10 20:13:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51742ce0e399f6779c3bd2d889d2f7a9 SHA-1: f29279ae5ede959524351dacccd4de0c02777251 SHA-256: 64cb84d7423031014d335ca830420e23867e886a0aafca6a5176dba70d3158a5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many of which point to a link farm designed for SEO spam. One prominent link redirects to a malicious infrastructure at 'ttraff.ru'. The ML classifier strongly indicated maliciousness, and the PDF structure suggests an attempt to distribute or redirect to other malicious PDF files.

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.ru/wb?keyword=ind%20as%20revenue%20recognition%20pdf
    • http://files.dragonflypaddleyoga.com/uploads/1/3/0/8/130813120/xodurebil_tagegonufede.pdf
    • http://files.kathleenmercury.com/uploads/1/3/0/9/130969242/439069.pdf
    • http://files.smoochespooches.co.uk/uploads/1/3/1/0/131070518/dixapavegip_susiribalalov_pudoforuladela.pdf
    • http://files.wendellmillspiano.com/uploads/1/3/0/8/130874501/biluwi.pdf
    • http://files.hamptonplaceclt.com/uploads/1/3/1/8/131871494/860063.pdf
    • http://files.pureandsimplebible.com/uploads/1/3/2/3/132302919/sofomevi_supizanotuxil_wewonixoxamobi.pdf
    • http://files.artisticcheezwiz.com/uploads/1/3/1/6/131606281/lapamo.pdf
    • http://files.northwoodssporttrailers.com/uploads/1/3/0/7/130776852/1363f4b4b1aa3e7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://dizujased.files.wordpress.com/2020/06/bewekober.pdf
    • https://fakuvinim168679484.files.wordpress.com/2020/07/15596781351.pdf
    • https://kaluferono394203149.files.wordpress.com/2020/06/mulibetupurikepovov.pdf
    • https://mabaxopol.files.wordpress.com/2020/07/17467134092.pdf
    • https://tudenobinedu359522656.files.wordpress.com/2020/06/natabiwo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1560/2337/files/zodota.pdf
    • https://cdn.shopify.com/s/files/1/0432/3213/3278/files/56680524763.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61066914906.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kepudanunakadop.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kozaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42262915950.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_off00006966.bin
b292ef2bf8760470030ab6742b0ce44f107eb2cd0651027b4cbf85b15a13af92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6966 5172 bytes
font_01_sfnt_off00007b0a.bin
6877faa08cbe715c6a5a56a3bdeb3aad3398607863ef975d8ce5400cc8cd946c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B0A 9796 bytes

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