Malicious PDF — malware analysis report

Static analysis result for SHA-256 1800ef70b34ca1a7…

MALICIOUS

PDF

34.1 KB Created: 2020-08-23 19:33:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e344fe710f2246583aff46dfb7460e1 SHA-1: ae9d8b7b692e0bc8065791b3aa36caa7e5e09e95 SHA-256: 1800ef70b34ca1a757d717ef948e0ab6d7772b56e6111721d168f48a79691cc1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body text is largely obfuscated but contains the same URL as the malicious redirector, suggesting an attempt to lure users to 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.cc/pify?keyword=features+of+non+chron+report+ks2
    • http://files.airbnbcleaningserviceanchorage.com/uploads/1/3/0/9/130970009/9450191.pdf
    • http://rirulu.jazminoniris.com/uploads/1/3/2/7/132740890/a6cd50cd.pdf
    • http://files.apollodrivingschoolhull.co.uk/uploads/1/3/0/7/130775427/pubajidef_vebopakujex_mijasupude.pdf
    • http://files.highperformancecoachkelly.com/uploads/1/3/1/0/131071063/gakib.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0444/8750/8135/files/lijefupobu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5630/8123/files/zoxetarubudewari.pdf
    • https://cdn.shopify.com/s/files/1/0429/9289/4115/files/nuxikiposubetuzagixidako.pdf
    • https://cdn.shopify.com/s/files/1/0448/5660/6881/files/angulos_geometria_plana.pdf
    • https://cdn.shopify.com/s/files/1/0432/5087/6578/files/purslane_health_benefits.pdf
    • https://cdn.shopify.com/s/files/1/0450/2247/8494/files/abecedario_completo_con_imagenes_para_imprimir.pdf
    • https://cdn.shopify.com/s/files/1/0429/6160/0668/files/49348090648.pdf
    • https://cdn.shopify.com/s/files/1/0430/4237/3785/files/xovirasudulagixujipani.pdf
    • https://cdn.shopify.com/s/files/1/0431/4087/4408/files/bowoxibetipobonukewovegol.pdf
    • https://cdn.shopify.com/s/files/1/0440/6122/9206/files/types_of_adjuvants_in_immunology.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_off00004b4b.bin
68d917f9a6f538e0f49a203f2fc77d64b69db1230e7482c3dfe0f3f00f5e0819
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B4B 5220 bytes
font_01_sfnt_off00005d12.bin
6a6a43cdb846bc1a3edb694275a3c10bde8c9a3a82ea472ba06e7c8f2c5157bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D12 8964 bytes