Malicious PDF — malware analysis report

Static analysis result for SHA-256 637e0685339bd8d6…

MALICIOUS

PDF

46.4 KB Created: 2020-08-04 06:42:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa5eaa6094820065f74e5f4432fb3348 SHA-1: 3e55e4c499607d634eea82acf824bb5cee4bb27e SHA-256: 637e0685339bd8d68266b115cbcd0c3701e2e3bdc4ddcc2bd3a96d2b73865a89
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm for SEO manipulation or to host malicious content. One prominent link, 'https://ttraff.ru/pify?keyword=download+bacaan+yasin+dan+tahlil+pdf', is flagged as a malicious redirector, indicating an attempt to lead users to harmful sites. The ML classifier also strongly flagged this PDF as malicious.

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=download+bacaan+yasin+dan+tahlil+pdf
    • http://files.joyfulljoyfull.net/uploads/1/3/1/8/131871424/lamadege-namutin-sezudunapomuxe-nudanuvodebu.pdf
    • http://files.dancingchickjams.com/uploads/1/3/1/4/131437474/cca693a.pdf
    • http://lavodini.carlosamrhein.com/uploads/1/3/1/8/131856462/ludufivojutoza.pdf
    • http://files.ecofloor.lt/uploads/1/3/1/3/131379277/pebim-silar-dabugivudezisoj-mivisupi.pdf
    • http://files.rosemaryphelan.com/uploads/1/3/1/8/131856212/kilujibe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6197/6994/files/jutola.pdf
    • https://cdn.shopify.com/s/files/1/0430/1278/4277/files/duwitadejuxekafukoza.pdf
    • https://cdn.shopify.com/s/files/1/0428/0179/1132/files/texowej.pdf
    • https://cdn.shopify.com/s/files/1/0437/3096/0549/files/39727091473.pdf
    • https://cdn.shopify.com/s/files/1/0435/3975/9259/files/17148589842.pdf
    • https://cdn.shopify.com/s/files/1/0435/5879/7471/files/mizeresuwo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5676/6869/files/bekazagoviwujedikezamo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8669/9925/files/agility_ladder_drills_for_football.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6141/files/soxirajom.pdf
    • https://cdn.shopify.com/s/files/1/0431/7180/7391/files/25830664871.pdf
    • https://cdn.shopify.com/s/files/1/0440/3465/4358/files/soil_nematodes.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006032.bin
8d0ecf2e8f3bbe78bad786a0ea7d7226389601b5df37523cbc039247ba7c9d46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6032 5480 bytes
font_01_sfnt_off000072ed.bin
4d958af3f72a802f88315aa69401f53432f562d326ac145a3dbef2b69b470163		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72ED 10080 bytes
font_02_sfnt_off000095b0.bin
16252ff771d6bd43a8c24caae88850e0b35ff5fc605971bd5203e69588505062		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95B0 16508 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.