Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dd353821bd3700f…

MALICIOUS

PDF

45.8 KB Created: 2020-08-05 01:11:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cfad7045ddd6eb9baacada0adce8fa94 SHA-1: 360e4f25a60a9cf43d8536a8a71e0fefe7a95547 SHA-256: 3dd353821bd3700f9c70b9ebccb899121c335e905465bbe9eed4b2886890a09b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains numerous embedded links, forming a link farm that redirects to malicious infrastructure. The primary malicious URL identified is https://ttraff.ru/pify?keyword=cerfa+vente+v%25C3%25A9hicule+occasion+pdf, which is flagged as a malicious redirector. The document body, while partially corrupted, suggests a lure related to vehicle sales, likely to entice users to click the malicious links.

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.ru/pify?keyword=cerfa+vente+v%25C3%25A9hicule+occasion+pdf
    • http://pafaviba.kristynwalker.com/uploads/1/3/0/7/130776760/pesuvufuzisux.pdf
    • http://files.massagemattersbynancy.com/uploads/1/3/2/7/132741535/384a311920.pdf
    • http://files.shahrilfaisal.com/uploads/1/3/1/4/131437889/zobasajufamajoj-zarugelo-newatol-dozir.pdf
    • http://files.tessellationelegance.com/uploads/1/3/1/3/131382223/refagilunelubep.pdf
    • https://cdn.shopify.com/s/files/1/0441/1247/8360/files/68900498715.pdf
    • https://cdn.shopify.com/s/files/1/0440/8619/8424/files/52973777816.pdf
    • https://cdn.shopify.com/s/files/1/0432/1827/2423/files/canvas_draw_circle.pdf
    • https://cdn.shopify.com/s/files/1/0431/7505/1424/files/gavuvutona.pdf
    • https://cdn.shopify.com/s/files/1/0429/8525/9159/files/59661989590.pdf
    • https://cdn.shopify.com/s/files/1/0432/2151/6449/files/kovuxuwirika.pdf
    • https://cdn.shopify.com/s/files/1/0433/1290/6405/files/ketoto.pdf
    • https://cdn.shopify.com/s/files/1/0433/1926/3397/files/factorio_rso_mod.pdf
    • https://cdn.shopify.com/s/files/1/0429/6278/0311/files/xafiravobu.pdf
    • https://cdn.shopify.com/s/files/1/0440/2338/2174/files/le_trait_de_l_argumentation.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000630a.bin
61d209950f2d5b40894f8b20eb95fc61a5fbf64dcc224158e701d938ffb24d06
pdf-font-stream PDF embedded font (sfnt) at offset 0x630A 5352 bytes
font_01_sfnt_off000074f0.bin
1e9e6867840f5525d2ab75c59406df0f3c2ad169dfe0185d4cafe5bd1b08c7f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x74F0 11928 bytes
font_02_sfnt_off00009a05.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A05 4324 bytes