Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3be526dfcec06d1…

MALICIOUS

PDF

47.2 KB Created: 2020-10-25 15:59:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: dae7de0856ba650c7adbe888a0444e1b SHA-1: e74d87f43c0184edb5dcbc007a23743f87236dbf SHA-256: e3be526dfcec06d17bd7d1eace153532e9e6828f850851db7657dfe86e922bfe
194 Risk Score

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=d%2527link+router+setup+guide In PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/lukuxaluk.pdfIn PDF document text
    • https://xurolimusogisuw.weebly.com/uploads/1/3/4/3/134395808/12397c1d33dd33f.pdfIn PDF document text
    • https://mosovokiz.weebly.com/uploads/1/3/4/3/134333023/5149634.pdfIn PDF document text
    • https://pivozedotafi.weebly.com/uploads/1/3/1/0/131070355/2531199.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000079a1.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000079a1.bin)
    • https://cdn.shopify.com/s/files/1/0435/8576/5533/files/31643354449.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3390/1256/files/tamiya_brushless_esc_02s_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5515/1774/files/how_many_times_to_jelq_a_day.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2715/9448/files/dp_airgometer_user_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/8360/0550/files/gudamulijutuwowud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5589/2630/files/surface_finish_symbols_in_engineering_drawing.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/23667185367.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/14497114861.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/pediatric_hypertension_guidelines_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/48176118559.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/vufigorijatula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7713/2992/files/32941345032.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/4080/2469/files/wifuviniroz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1049/0022/files/26341683781.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/9022/9413/files/solidworks_simulation_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6648/3103/files/strucid_beta_hack_script.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/rasesodelibuk.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/robotics_in_civil_engineering.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/api_testing_using_postman_tutorial.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 extracted file (font_00_sfnt_off000079a1.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000079a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79A1 5016 bytes
SHA-256: 779c9e3002d0a2a56d455fc302bd30dc3e6ff0d5d7ab041551d2f331988d1b05
font_01_sfnt_off00008ac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AC8 10824 bytes
SHA-256: cda0473e06516c56b15e8cb41bd79369aa3f7a95d09970fc70e0dd1a3d9252d3