Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ada587debaade0f…

MALICIOUS

PDF

41.8 KB Created: 2020-08-30 01:03:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 142d15db4e2b5ef56be8e9c7e0be38fa SHA-1: f067a4edbbd39e3e8f0d7ae75e41c9a011963f18 SHA-256: 2ada587debaade0f0a99c5f20a93d18bc47dbf9ecbc3e6262a7cbc85c185ea3c
152 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also features a mass of external PDF links, likely for SEO manipulation or to lead users to malicious content. The primary malicious URL identified is https://ttraff.club/wix?keyword=obscure+ps2+iso+espa%25C3%25B1ol.

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/wix?keyword=obscure+ps2+iso+espa%25C3%25B1ol
    • https://cdn.shopify.com/s/files/1/0435/9503/8888/files/tutorial_de_excel_2020_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0434/2946/2165/files/notododixuwas.pdf
    • https://cdn.shopify.com/s/files/1/0435/3087/9136/files/factors_affecting_academic_performance_of_students_research_paper.pdf
    • https://cdn.shopify.com/s/files/1/0429/6297/6921/files/55299277664.pdf
    • https://cdn.shopify.com/s/files/1/0438/9391/5800/files/9812828584.pdf
    • https://static.usrfiles.com/ugd/81d6a4_326c23d8ec764e1a98f4688261007017.pdf
    • https://static.usrfiles.com/ugd/b8c837_f597cbd6716a4d549b8655d98ca9ebd9.pdf
    • https://static.usrfiles.com/ugd/429b25_f43da2462477486db205e0cad701abaa.pdf
    • https://cdn.shopify.com/s/files/1/0437/6412/1757/files/tekodufunimewi.pdf
    • https://cdn.shopify.com/s/files/1/0438/3621/1357/files/bifojosi.pdf
    • https://cdn.shopify.com/s/files/1/0436/7230/5817/files/acetilcolina_e_noradrenalina.pdf
    • https://cdn.shopify.com/s/files/1/0436/9743/8875/files/dawatabonevijove.pdf
    • https://cdn.shopify.com/s/files/1/0431/8278/4676/files/21034769192.pdf
    • https://cdn.shopify.com/s/files/1/0434/5813/4182/files/katy_perry_firework_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0440/1725/4565/files/walmart_springform_cake_pan.pdf
    • https://cdn.shopify.com/s/files/1/0432/7122/5502/files/lewafudutufomuzarepe.pdf
    • https://cdn.shopify.com/s/files/1/0434/5063/0296/files/wotosewatojifututebu.pdf
    • https://cdn.shopify.com/s/files/1/0465/9619/4469/files/ti_tecnologia_da_informao_conceito.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_off000062b8.bin
51a5f8f91218f5d4df7aba9960dc2da0a3e39c357a508957901aea9e4b1c52e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62B8 5436 bytes
font_01_sfnt_off000074f3.bin
7aa769e2ae7e62f67e8c22e21825213179a29f3766993e1be29974b83a1ddc15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74F3 10344 bytes

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