Malicious PDF — malware analysis report

Static analysis result for SHA-256 711df783566147ed…

MALICIOUS

PDF

49.9 KB Created: 2020-08-23 01:33:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ef47a5eb5e706fb04c206907255d90e SHA-1: 0e9194b30920fbb6578c989d74a0fae56732886c SHA-256: 711df783566147ed8c3facf6a72befbc2a8aeacf1349af06d2c8784d7d8b1ba4
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to host or distribute further malicious content. The document body, though heavily obfuscated, contains the same URL and text related to a 'Dawoodi bohra marsiya app', suggesting a lure to entice users to click the malicious link. The presence of multiple embedded PDF links further supports the classification as a link farm designed for malicious redirection.

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=dawoodi+bohra+marsiya+app
    • http://biwijimiz.gurjinderyoga.com/uploads/1/3/1/4/131454526/bebodiboguzuzuje.pdf
    • http://kagexi.jolttherapytool.com/uploads/1/3/1/4/131454057/lulibilolebav-fisaba-koferuzixeviji-noxunut.pdf
    • http://files.kennedysarff.com/uploads/1/3/0/7/130775747/xapometedixoxav.pdf
    • http://lotokefu.stmarknola.org/uploads/1/3/2/7/132710592/zanoleliti-jonazumi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/4713/1035/files/balanopostitis_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0434/3165/7621/files/sovaxigafipasemerozime.pdf
    • https://cdn.shopify.com/s/files/1/0430/2913/5521/files/28818583233.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/63491738983.pdf
    • https://cdn.shopify.com/s/files/1/0434/0432/9125/files/49013339561.pdf
    • https://cdn.shopify.com/s/files/1/0435/1718/2104/files/kekafupegidav.pdf
    • https://cdn.shopify.com/s/files/1/0435/8812/4829/files/naming_of_alkanes_alkenes_and_alkynes.pdf
    • https://cdn.shopify.com/s/files/1/0431/8081/8581/files/47033411362.pdf
    • https://cdn.shopify.com/s/files/1/0434/8156/3286/files/chemical_bonding_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0432/2004/1886/files/zozimamukufotu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6838/3642/files/bimulitu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5501/4298/files/juxitemotawej.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_off00006e87.bin
c710acae5e3500f4f3484576f337a2d5a9b79dcb2121a0fdd4f75b3cb2a3f21d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E87 5500 bytes
font_01_sfnt_off00008129.bin
75be0ed1bef3785965c557c340c43991110079b358093d87bfa513ea6050513f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8129 10092 bytes
font_02_sfnt_off0000a406.bin
c62afdbcba4e3dae6b58399b1890a9be21b4594834c262312f84189579248b55		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA406 16432 bytes

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