Malicious PDF — malware analysis report

Static analysis result for SHA-256 0243dfd2f2430720…

MALICIOUS

PDF

43.7 KB Created: 2020-08-31 19:58:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88d971fbf4cba5c5d9e4d287ac5cf17f SHA-1: 6e110ad7490e9af57126b13021735ddb17225f3f SHA-256: 0243dfd2f24307204b4523198708d47e45cbfc18954d1ded4e0c04c512abdb8d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. Another critical heuristic identified a PDF link farm, suggesting a tactic to manipulate search engine results or lure users to malicious sites. The ML classifier strongly supports the malicious nature of this PDF.

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/wix?keyword=at+a+glance+widget
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/3862/9288/files/rss_book_bunch_of_thoughts_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0451/3293/9417/files/behold_a_pale_horse_deutsch.pdf
    • https://cdn.shopify.com/s/files/1/0432/2187/6900/files/vitajifulimaget.pdf
    • https://cdn.shopify.com/s/files/1/0433/5245/7369/files/minecraft_realistic_world_preset.pdf
    • https://cdn.shopify.com/s/files/1/0444/0332/7142/files/java_dice_game.pdf
    • https://cdn.shopify.com/s/files/1/0434/1828/8284/files/86944659116.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/qasida_burda_sharif_ringtone.pdf
    • https://cdn.shopify.com/s/files/1/0430/7753/3856/files/lost_wax_investment_casting_process.pdf
    • https://cdn.shopify.com/s/files/1/0437/2935/4917/files/pengertian_model_addie.pdf
    • https://cdn.shopify.com/s/files/1/0435/2901/1359/files/xodokediv.pdf
    • https://cdn.shopify.com/s/files/1/0434/8723/2166/files/gorarisasuje.pdf
    • https://cdn.shopify.com/s/files/1/0431/8583/2096/files/kexeruwexuja.pdf
    • https://cdn.shopify.com/s/files/1/0429/2981/5705/files/ansi_c_language_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/0700/9180/files/prueba_360_grados_descargar_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0432/7338/8190/files/deposusejinunebuba.pdf
    • https://cdn.shopify.com/s/files/1/0437/0890/7688/files/cbse_ncert_12th_biology_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0431/1767/4656/files/big_data_basic_tutorial.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_off00006b7c.bin
7a2a2b2cafc9bd5c4a41a78901fe59f83646c51c34cd166ee8962b65d1353c26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B7C 4916 bytes
font_01_sfnt_off00007c57.bin
8278ccb496c96678e504ac6c977d6b1146757f5d0cb29c676c002effb08291e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C57 11432 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.