Malicious PDF — malware analysis report

Static analysis result for SHA-256 15a08ee888e17032…

MALICIOUS

PDF

39.6 KB Created: 2020-07-21 09:56:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0ea8474fe747fc967b36c0f27389e6f SHA-1: e02059cb87d8fbae98e07056246fbd6e27d446b7 SHA-256: 15a08ee888e1703273d443f424a304de497fa317bdf73c1881a58381c1d9d44c
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, specifically a URL associated with a redirector. The document body, though heavily obfuscated, suggests a lure related to 'PDF file online download'. The presence of numerous external PDF links further indicates a link farm or SEO manipulation tactic, likely to drive traffic to malicious sites.

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=pdf%20file%20online%20download
    • http://files.northmiresouces.org/uploads/1/3/0/8/130874058/vopilu.pdf
    • http://files.bampilates.com/uploads/1/3/1/4/131438741/1940dcd9a51.pdf
    • http://files.asws.info/uploads/1/3/1/1/131163684/vokemevof.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1410/2950/files/wepup.pdf
    • https://cdn.shopify.com/s/files/1/0430/8379/2545/files/vetofidavuzexe.pdf
    • https://cdn.shopify.com/s/files/1/0431/9900/4831/files/38050243681.pdf
    • https://cdn.shopify.com/s/files/1/0428/5222/1091/files/dasadonodojomesizatuwugos.pdf
    • https://mupujinivibu.files.wordpress.com/2020/06/93304956444.pdf
    • https://pimujapuza.files.wordpress.com/2020/07/kuwowekigasanuzoju.pdf
    • https://fuluvin.files.wordpress.com/2020/06/lisaduzojato.pdf
    • https://cdn.shopify.com/s/files/1/0430/3601/6802/files/kipake.pdf
    • https://cdn.shopify.com/s/files/1/0432/8482/4222/files/xagodojal.pdf
    • https://cdn.shopify.com/s/files/1/0432/0067/6001/files/72682785285.pdf
    • https://cdn.shopify.com/s/files/1/0436/1669/8526/files/85367899596.pdf
    • https://cdn.shopify.com/s/files/1/0433/5714/3205/files/43599033931.pdf
    • https://cdn.shopify.com/s/files/1/0437/0395/9720/files/3547838444.pdf
    • https://cdn.shopify.com/s/files/1/0428/6975/1967/files/lafewiborewidevet.pdf
    • https://cdn.shopify.com/s/files/1/0433/5799/5160/files/xumademilepoja.pdf
    • https://cdn.shopify.com/s/files/1/0433/9728/3992/files/wekuwaridulezitunakive.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_off000060e8.bin
0109b0ed0f5ebe3d99c8bff748fd400b93c67fedc9ef23c598aa3d0bc1dec1b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60E8 4428 bytes
font_01_sfnt_off00007004.bin
03f3828a928bcf3454859406ed89e23debf7a70f29a115e0e89d6dd315970681		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7004 9740 bytes

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