Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7dd08fe42ab0210…

MALICIOUS

PDF

55.7 KB Created: 2020-08-04 17:09:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb2e1ddda860b4b21c33fd4134f16736 SHA-1: 34f1bfbac74e16cbb355500f62ea5a6bf886216f SHA-256: b7dd08fe42ab021090965828330296ca6f592d7154fa0198cad0c8fad61b6fe1
152 Risk Score

Malware Insights

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

This PDF document exhibits malicious characteristics, primarily through a large number of embedded links. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that at least one of these links points to known malicious redirector infrastructure, specifically 'https://ttraff.com/pify?keyword=hat%25C3%25A1lyos+alapt%25C3%25B6rv%25C3%25A9ny+pdf'. The 'PDF_SEO_LINK_FARM' heuristic further confirms the presence of numerous external links, suggesting an attempt to distribute malicious content or engage in phishing. 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.com/pify?keyword=hat%25C3%25A1lyos+alapt%25C3%25B6rv%25C3%25A9ny+pdf
    • http://files.floridafundraiser.com/uploads/1/3/0/8/130873851/87b15e9ab8f0835.pdf
    • http://didulezaw.quickandcleanwash.com/uploads/1/3/1/0/131070859/5efceddccce6.pdf
    • http://files.ouidancema.com/uploads/1/3/1/3/131398144/buxokesarizuvob_teladi_towakejudame.pdf
    • http://files.sandrastudioone13.com/uploads/1/3/2/3/132302780/takiba.pdf
    • https://cdn.shopify.com/s/files/1/0435/9385/9240/files/how_to_delete_a_channel_on_slack.pdf
    • https://cdn.shopify.com/s/files/1/0438/6498/1664/files/management_accounting_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0435/7039/7352/files/ravaludirivun.pdf
    • https://cdn.shopify.com/s/files/1/0435/5502/9141/files/46857218170.pdf
    • https://cdn.shopify.com/s/files/1/0429/4728/1062/files/app_to_edit_documents_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/6465/6026/files/windows_xp_iso_64_bit.pdf
    • https://cdn.shopify.com/s/files/1/0437/7706/5121/files/manual_mitre_saw.pdf
    • https://cdn.shopify.com/s/files/1/0434/0894/9402/files/57709130215.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/5866669006.pdf
    • https://cdn.shopify.com/s/files/1/0427/4978/8327/files/cesur_yeni_dnya_yandex.pdf
    • https://cdn.shopify.com/s/files/1/0430/9313/1425/files/besozesavinenu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7526/3909/files/vutojapasuxozeroni.pdf
    • https://cdn.shopify.com/s/files/1/0427/7442/9852/files/24898489450.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_off00009924.bin
f0a84156900e1a36cb9c0bf21a00b200583c5f4f3951857e32089e3c9a3a9e79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9924 5672 bytes
font_01_sfnt_off0000ab72.bin
42863f8bac57f2a26b05e99e9dab83e0469b7d5f7b1ec596814f1967f4856746		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB72 11732 bytes

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