Malicious PDF — malware analysis report

Static analysis result for SHA-256 459307c35fefb16d…

MALICIOUS

PDF

44.3 KB Created: 2020-11-01 19:17:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 169089f16f3b014304e46ef237c11623 SHA-1: deb4d1caee8f642f6b9515230916e04afd155fac SHA-256: 459307c35fefb16d37ac1f4123bf58c6556f526deafd975a9dcdf041da4b7a14
162 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.link/123?keyword=download+youtube+music+videos In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378155/normal_5f91777e84822.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369495/normal_5f89c3ea88462.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/adjectives_worksheets_for_grade_6.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/judge_jean_woodford.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/monetarism_plays_a_role_in_economic_growth_by_brainly.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/17387807638.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/pazetowelububiwinebe.pdfIn PDF document text
    • https://s3.amazonaws.com/rimadefule/fart_piano_music.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/rto_passing_list_of_maharashtra.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/fobia_social_en_nios.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/carcosa_rpg_download.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/pensar_la_arquitectura_peter_zumthor_descargar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9204/2137/files/33466167899.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/matuwobixoboj.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/watts_autopsy_report.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/jupezopiwowipitixonen.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D3E 5384 bytes
SHA-256: e1020d1a90bc7d41297fb6f62c3ade438a5b8d4fd192724afc1f40191c169be0
font_01_sfnt_off00007f9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F9E 10768 bytes
SHA-256: ae33913ced8afd0ce6ec34048192025678ac3f3301cb75d7799fc8b959d541e9