Malicious PDF — malware analysis report

Static analysis result for SHA-256 428e761a9bfced44…

MALICIOUS

PDF

44.2 KB Created: 2020-08-19 08:57:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8d3b8b61e5df5349f12790219fcea60d SHA-1: bb715fa82c81ced0275122bdfcee2cd81ec459a2 SHA-256: 428e761a9bfced442d4fe851f34d2b01cbcbd0e04b494ae49f70cd84f0eb8cf4
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one specifically pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirector. This suggests the PDF is designed to redirect users to malicious content, likely for phishing or malware distribution.

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.ru/pify?keyword=2000+bayliner+capri+1850+lx+manual In PDF document text
    • http://files.mushroomsandmore.net/uploads/1/3/1/0/131070434/8886f0b0.pdfIn PDF document text
    • http://files.corporatechilllout.com/uploads/1/3/1/3/131384636/kapebef.pdfIn PDF document text
    • http://wevuzor.futurefitness4allofyou.com/uploads/1/3/1/4/131454165/sejogunekizema_bosepi.pdfIn PDF document text
    • http://files.seshalloween.com/uploads/1/3/2/8/132814305/8009152.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0653/3527/files/vujololorafolafemijemi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5109/0077/files/renadalotejewilitamiwav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2177/7570/files/traitement_blennorragie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6563/9073/files/reading_people_s_body_language.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6551/5933/files/84718526603.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0181/2888/files/vefesuposonubofamegubeses.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xidegafizupewutuzu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3488/5796/files/pid_c_code.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0965/4434/files/76746245084.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9799/6960/files/compliance_risk_management_plan.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

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000613a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x613A 5760 bytes
SHA-256: 0ead71b70458e4983dfe0b2cba77a7c74ae4ae9fd1cb361123fffdd3ebfaa521
font_01_sfnt_off000074bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74BC 15328 bytes
SHA-256: cb1a5a7aa5c8c572a3fcccf3db21b294b7d04644775520762881d5b9df749828

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