Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a66604247bdffd3…

MALICIOUS

PDF

44.6 KB Created: 2020-08-24 08:21:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: edb82ea2655f98a3e5e4733fe15ce808 SHA-1: 14d705b063279654d154cfc66d4bcbf8bd3fd0ff SHA-256: 1a66604247bdffd37cc3ccfee4cf0234f516509afe1a2aab69ab332f92688d8a
152 Risk Score

Malware Insights

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

This PDF file contains a significant number of embedded links, identified as a PDF link farm. One of the primary links, 'https://ttraff.cc/pify?keyword=binomische+formel+rechner', is flagged as a malicious redirector. The presence of numerous links to PDFs hosted on platforms like Shopify suggests an attempt to manipulate search engine results or 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.cc/pify?keyword=binomische+formel+rechner
    • http://fewisa.tradeharbor.org/uploads/1/3/2/6/132682076/2839516.pdf
    • https://cdn.shopify.com/s/files/1/0427/8353/9366/files/airservices_act_1995.pdf
    • https://cdn.shopify.com/s/files/1/0432/8436/5468/files/50219043588.pdf
    • https://cdn.shopify.com/s/files/1/0434/7016/0032/files/metformina_efectos_secundarios_riones.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99914628395.pdf
    • https://cdn.shopify.com/s/files/1/0461/3868/7641/files/pokemon_breeding_guide_ultra_moon.pdf
    • https://cdn.shopify.com/s/files/1/0433/3902/2494/files/digekesavirawufuvoporud.pdf
    • https://cdn.shopify.com/s/files/1/0439/4532/8808/files/carnivore_diet.pdf
    • https://cdn.shopify.com/s/files/1/0431/5394/8836/files/vivutoku.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xodowowesibaxen.pdf
    • https://cdn.shopify.com/s/files/1/0433/3315/7014/files/57181295366.pdf
    • https://cdn.shopify.com/s/files/1/0430/9798/1089/files/que_es_un_enlace_ionico_y_covalente.pdf
    • https://cdn.shopify.com/s/files/1/0427/8606/2495/files/digital_design_5th_edition.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_off00006224.bin
6b54c4cbe77d3b4e3c731908d6c3b20aa1b5adab8029d0d36e07c57f7a1c36f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6224 4960 bytes
font_01_sfnt_off000072d3.bin
4a95c6232d6f2725a603b03ad8c7073a7a08d30c910e7ceeaba9f5dd3dbfc217
pdf-font-stream PDF embedded font (sfnt) at offset 0x72D3 16104 bytes