Malicious PDF — malware analysis report

Static analysis result for SHA-256 c950e695dc3de4cc…

MALICIOUS

PDF

43.5 KB Created: 2020-08-15 19:37:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fac2f34fe18a353fd003b2d3c5ae4150 SHA-1: ff64f5ffb2a788bf7db65bd73229872e1c2c5f1a SHA-256: c950e695dc3de4cc3d7e1cdffe2afd20547fc0ad8235aaf20929994b2b58886c
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. Additionally, it exhibits characteristics of a PDF SEO link farm, embedding numerous external PDF links. The primary malicious URL identified is https://ttraff.cc/wb?keyword=factors%20affecting%20public%20policy%20formulation%20pdf, which likely serves as a gateway to further malicious content.

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/wb?keyword=factors%20affecting%20public%20policy%20formulation%20pdf
    • http://merolora.montaupcc.com/uploads/1/3/2/6/132681579/ruganar-xadixiremujaba-fofukinixiga-bimatudikaturu.pdf
    • http://files.adinalernerphotography.com/uploads/1/3/0/8/130814682/foxemagixakaxo.pdf
    • https://cdn.shopify.com/s/files/1/0429/2263/9527/files/pokemon_go_curveball_template.pdf
    • https://cdn.shopify.com/s/files/1/0433/8139/1514/files/minecraft_pixel_art_generator.pdf
    • https://cdn.shopify.com/s/files/1/0429/5763/5743/files/cognitive_behavioural_therapy_for_anxiety.pdf
    • https://cdn.shopify.com/s/files/1/0433/0808/9509/files/conservativefighters._com_fake_news.pdf
    • https://cdn.shopify.com/s/files/1/0430/8297/3345/files/virtualbox_shared_folder_ubuntu_guest.pdf
    • https://cdn.shopify.com/s/files/1/0431/4395/4594/files/rolling_process_in_metal_forming.pdf
    • https://cdn.shopify.com/s/files/1/0435/4814/7867/files/medebupabosenimukikada.pdf
    • https://cdn.shopify.com/s/files/1/0438/0930/8829/files/79707726087.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/526428265.pdf
    • https://cdn.shopify.com/s/files/1/0429/2935/6959/files/nigedusarubipumo.pdf
    • https://cdn.shopify.com/s/files/1/0450/9820/5349/files/bis_711.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_off00006c26.bin
beda7123ab8476eaf3058761e496255fcd7b5d9b4398abc8eeac941a304a6427
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C26 5672 bytes
font_01_sfnt_off00007f5b.bin
87dcf522453c216eb7fac8e8fdc70881e86d9f51fe498485de320189c62b297e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F5B 9904 bytes