Malicious PDF — malware analysis report

Static analysis result for SHA-256 855ffad526e280ca…

MALICIOUS

PDF

40.6 KB Created: 2020-08-05 14:49:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6ddb77b2105acb06a1ded737c46d6a6b SHA-1: dcbab073d3eda324bc383a33be9a743d8a0ca0f0 SHA-256: 855ffad526e280ca1db6fea9aaccf5c1178675f1e1e9622d234e127454307359
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, many of which point to a redirector service (ttraff.com) that is flagged as malicious. The document body and heuristics indicate a link farm strategy, likely to distribute malware or conduct phishing by luring users to download content. The presence of a malicious redirector URL is the primary indicator of malicious intent.

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.com/pify?keyword=botulisme+adalah+pdf In PDF document text
    • http://files.palmettoswingevents.com/uploads/1/3/0/8/130874587/5869242.pdfIn PDF document text
    • http://files.watsonhill.com/uploads/1/3/1/3/131381553/7721762.pdfIn PDF document text
    • http://files.redandgreenschool.org/uploads/1/3/1/3/131382406/tasixar_xuzisus_xoveju.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/1/0431/8678/2369/files/human_anatomy_mckinley_4th_edition_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1884/4322/files/fanotepiluwete.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8477/5578/files/13050421801.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3497/6157/files/census_2020_chapter_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0605/7888/files/49389377658.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9456/5271/files/vudewiregipiborewajezow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76588695657.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0152/0029/files/xetuvokufabemiruxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5222/1091/files/wegogufupakuroxixe.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 8

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_off00005f28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F28 5236 bytes
SHA-256: 5560a8029660bc64f18194b03a70c67a0b25d9e86c06315a2e79daa282609969
font_01_sfnt_off000070d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70D2 10992 bytes
SHA-256: a1f28fd993e9df6260d9c4cf8ffcc8422f6c667c1f5d98826beac7e8749a1046

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