Malicious PDF — malware analysis report

Static analysis result for SHA-256 73f0ea455b65ddfa…

MALICIOUS

PDF

42.3 KB Created: 2020-08-27 19:55:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4261ab3d20c08af5f9137b47ec69faef SHA-1: 06b4334fd85994b30f3c679d8d137a1d5118be63 SHA-256: 73f0ea455b65ddfaea500de1a6dbdfe9550ef841655d434289c0c9a3a480b603
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.club, which is likely used to obscure the final destination of the malicious content. The PDF also contains a large number of links to other PDFs, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

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.club/pify?keyword=gecenin+sonuna+yolculuk+bkm
    • http://files.attitude4acting.com/uploads/1/3/1/4/131438282/5600802.pdf
    • http://files.americuspregnancy.org/uploads/1/3/0/7/130738740/miwonul_ritudara.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/1830/5179/files/bofezamera.pdf
    • https://cdn.shopify.com/s/files/1/0433/2758/6472/files/favosepopugeneretenot.pdf
    • https://cdn.shopify.com/s/files/1/0464/3337/0264/files/disputing_credit_report_items.pdf
    • https://cdn.shopify.com/s/files/1/0434/1320/9246/files/physics_fourth_edition_walker.pdf
    • https://cdn.shopify.com/s/files/1/0432/0873/6928/files/materi_biologi_sma_kelas_11_kurikulum_2020.pdf
    • https://cdn.shopify.com/s/files/1/0447/0715/2026/files/clinical_pathology_made_ridiculously_simple_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/4786/9850/files/opel_astra_2008_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/9309/6600/files/kaginogagefoda.pdf
    • https://cdn.shopify.com/s/files/1/0435/9317/1103/files/17985915318.pdf
    • https://cdn.shopify.com/s/files/1/0440/9622/5432/files/chennai_road_map_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/5060/5461/files/sociological_perspective_on_gender.pdf
    • https://cdn.shopify.com/s/files/1/0427/9628/6111/files/mumeletoxivubikodinarejat.pdf
    • https://cdn.shopify.com/s/files/1/0463/5607/0561/files/97592649871.pdf
    • https://cdn.shopify.com/s/files/1/0429/1588/9305/files/free_driver_scanner_canon_lide_220.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_off000064a0.bin
9de846cab9865a99782122ac49eeb271752337aa3383ca4cf428b3b5a4f6553c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64A0 5188 bytes
font_01_sfnt_off00007644.bin
b6d5fd062a1b06e6e93c5ab82290984058cfe444d5c5b6d94cd397c237e337dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7644 11500 bytes

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