Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f2bf3df3388e64c…

MALICIOUS

PDF

63.1 KB Created: 2020-08-23 02:13:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4fa1a2373f0714555579257792c14dd6 SHA-1: fa41b225b963d6fd0d35033a97971151fe80f4d1 SHA-256: 5f2bf3df3388e64c5c81840a26c69906948a6548c6f69a3e756a63003162cc63
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the URL https://ttraff.ru/pify?keyword=allahu+akbar+allahu+akbar+song. The document body, though heavily obfuscated, contains this URL and references to other PDF files hosted on Shopify, suggesting a tactic to obscure the malicious destination. The ML classifier strongly indicated maliciousness, supporting the presence of a malicious redirector.

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/pify?keyword=allahu+akbar+allahu+akbar+song
    • http://files.bangalowanglican.com/uploads/1/3/1/3/131398560/timojowi_lezawupotisa_vujepona_rifogo.pdf
    • http://files.uctmed1973.com/uploads/1/3/2/7/132712369/b4b8ce2.pdf
    • http://fuxakog.midwestdessertfests.com/uploads/1/3/0/8/130874601/dixen.pdf
    • http://files.svigoldennectar.com/uploads/1/3/0/9/130969718/bukosenasopepokofa.pdf
    • http://pibijaw.christopherkrieg.com/uploads/1/3/1/3/131398368/remunigediforadof.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102Hussain
    • http://smc.org.inhttp://smc.org.in
    • https://cdn.shopify.com/s/files/1/0434/1992/6679/files/31858197239.pdf
    • https://cdn.shopify.com/s/files/1/0433/7162/6652/files/tekilodo.pdf
    • https://cdn.shopify.com/s/files/1/0454/6186/4606/files/kibefanotidor.pdf
    • https://cdn.shopify.com/s/files/1/0429/7113/6154/files/59655792190.pdf
    • https://cdn.shopify.com/s/files/1/0437/7663/9134/files/christmas_movies_guide_2018_uk.pdf
    • https://cdn.shopify.com/s/files/1/0434/0737/6542/files/minecraft_village_blacksmith_blueprints.pdf
    • https://cdn.shopify.com/s/files/1/0435/2465/3224/files/6450620225.pdf
    • https://cdn.shopify.com/s/files/1/0432/2826/6654/files/javelopuvibeginazug.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
    • https://gitlab.com/smc/meera/blob/master/COPYING
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065f7.bin
8b1e1b768d1a0c760c9d396f8e614d487dc142b867723d1dc994a0d6fc6d75ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65F7 8316 bytes
font_01_sfnt_off000081a6.bin
abe96b9739ba2967fc1269cbb20c4fb89d115cf31630c6f2609f27f9648b6738		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81A6 5140 bytes
font_02_sfnt_off0000930b.bin
b9a4b9561996c7fadc4ddedc1fc3b7d5d3e64558bd53e20062a66bf1a24d7d32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x930B 4000 bytes
font_03_sfnt_off0000a1f0.bin
005b2ecc3bf03594e763cc2ceaf1785831033ef8fcea4279ac120183cc77cacf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1F0 16936 bytes
font_04_sfnt_off0000d36d.bin
8adac627ba85d0dd135532839b85b57a87384e7dadc8e58a5c015409761bd205		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD36D 17340 bytes

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