Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c669d0f6c01c8fa…

MALICIOUS

PDF

50.0 KB Created: 2020-08-21 17:25:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c38e87521560af5ced1a20b095e37f4 SHA-1: ed36a1ecc37130ec6b24c7ecfec08e543f622802 SHA-256: 6c669d0f6c01c8faf8d0d37a3ef0b8a2121c5de797094bcd1bc7710e33a9ff50
154 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, including a critical redirector link to 'ttraff.cc'. The ML classifier strongly flagged this PDF as malicious, and heuristic analysis identified it as a link farm designed to direct users to potentially harmful content. Although no scripts were explicitly extracted, the presence of embedded URLs and the overall structure suggest an attempt to lead users to malicious sites, likely as part of a phishing or scam campaign.

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.cc/pify?keyword=internet+of+things+ppt
    • http://jezesamug.papoulisconstructions.com/uploads/1/3/0/7/130776257/4984453.pdf
    • http://files.ancientwavestudios.com/uploads/1/3/0/7/130775837/kodivamilukozad_wesaberebujozu.pdf
    • http://badolad.alkhomassia.com/uploads/1/3/1/4/131453850/5b1903870d90fe.pdf
    • http://files.davaocityproperties.com/uploads/1/3/1/4/131409309/jilubigat.pdf
    • http://papatosar.mckinleyrich.com/uploads/1/3/0/9/130969596/8741703.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/6300/8661/files/musaletivasekivojivu.pdf
    • https://cdn.shopify.com/s/files/1/0435/3864/5144/files/piwodeze.pdf
    • https://cdn.shopify.com/s/files/1/0429/5491/5993/files/xigutipafobebenelut.pdf
    • https://cdn.shopify.com/s/files/1/0429/9961/1553/files/dudajujotisusu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9839/9139/files/pajez.pdf
    • https://cdn.shopify.com/s/files/1/0432/6447/5299/files/6820098308.pdf
    • https://cdn.shopify.com/s/files/1/0436/2820/0096/files/formulario_boleto_estudiantil_gratuito_misiones.pdf
    • https://cdn.shopify.com/s/files/1/0436/3016/6176/files/zorexavojavitajoxep.pdf
    • https://cdn.shopify.com/s/files/1/0428/0582/1599/files/31429423883.pdf
    • https://cdn.shopify.com/s/files/1/0438/2670/8637/files/babipax.pdf
    • https://cdn.shopify.com/s/files/1/0430/6396/7906/files/63949175253.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_off00007acf.bin
c72712f05cf874ed18d4f8d6ad0c9e5ea997fa831ef0f9e65ca74acd740ea759		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ACF 4860 bytes
font_01_sfnt_off00008b5e.bin
dee1165cb974b7fd2f1f940e19f03a04c7587814cedda10e1653962f20592eac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B5E 15252 bytes

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