Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eb2b643f14f1dde…

MALICIOUS

PDF

34.7 KB Created: 2020-07-12 01:33:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d83451f8339eced199eb98e9d0f63446 SHA-1: 2d5801f67c0faa80c1b1d4651ef3c5dc1f2f7798 SHA-256: 4eb2b643f14f1ddedbe256ff111914568e5b12d05d9138da6d3cea41f81a65a5
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. The primary malicious link, 'https://ttraff.ru/pify?keyword=callouts+lspdfr+gta+v', is identified as a known malicious redirector. The document body also contains this URL and other PDF links, suggesting a link farm or redirection tactic to distribute further malicious content. No scripts were extracted from this sample.

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=callouts+lspdfr+gta+v
    • http://files.bonniesminiaturedolls.com/uploads/1/3/0/8/130874325/6089742.pdf
    • http://files.yoursosweetamericandi.co.uk/uploads/1/3/0/7/130740127/nuvufubokevoxi-retowu-waritaronafa-xajixafeg.pdf
    • http://files.bernadetteevans.com/uploads/1/3/2/6/132681053/9a4021469d56b7.pdf
    • http://files.vontoba.com/uploads/1/3/1/4/131438741/zipunux.pdf
    • https://gemifukuwi.files.wordpress.com/2020/06/95674406231.pdf
    • https://xujibafaz.files.wordpress.com/2020/06/55615711378.pdf
    • https://xodugunoku.files.wordpress.com/2020/06/15336033816.pdf
    • https://solasuz.files.wordpress.com/2020/07/81471194326.pdf
    • https://rasikud.files.wordpress.com/2020/07/65447994784.pdf
    • https://dopobuzeza.files.wordpress.com/2020/06/xugaliwoximexewajuv.pdf
    • https://nefakiwaputi.files.wordpress.com/2020/07/93157285086.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bugos.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81143567733.pdf
    • https://cdn.shopify.com/s/files/1/0430/5318/7221/files/69391409482.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sasukeseduvemuledup.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/99781003244.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31082235151.pdf
    • https://cdn.shopify.com/s/files/1/0430/9493/3665/files/7808634706.pdf
    • https://cdn.shopify.com/s/files/1/0432/6676/9051/files/kopavure.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66656561998.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_off00004b9e.bin
b0446fa06fd1908c5ed0724a9909264126b27d21d49c0533b93f5adf8e7c51b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B9E 4900 bytes
font_01_sfnt_off00005c66.bin
4a8051fbc4da954557d5a32a9f296695514508d7ab606edb439404b1ad5ce454		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C66 9868 bytes

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