Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c5a9975baef6883…

MALICIOUS

PDF

49.1 KB Created: 2020-08-24 15:08:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 80623c79844b19fe4a9a8b99baadcaae SHA-1: c6271a63660f5199ec80c1df3aee4a1d7fef2e24 SHA-256: 4c5a9975baef688315e36641d9d33c19454da5bd82d66da5ee468b633493f111
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which are part of a link farm designed to improve SEO for malicious content. One prominent link, 'https://ttraff.com/pify?keyword=adobe+reader+pro+xi+free', is identified as a malicious redirector. This suggests the document's primary purpose is to trick users into clicking this link under the guise of a software download, leading them to malicious infrastructure.

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=adobe+reader+pro+xi+free In PDF document text
    • http://gotilo.quackquackcolorado.com/uploads/1/3/0/8/130874118/0e2d5b50cf0473.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/1/0435/6908/6623/files/medicare_benefits_policy_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4837/8274/files/calendario_agosto_2020_para_imprimir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6799/8359/files/xuvepejagara.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9300/7272/files/lowerebejavofiwojojuse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2491/6388/files/mubiwaberopuseridapisop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3006/8898/files/69033869428.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6405/6225/files/79664977215.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1348/9318/files/bearing_size_pdf_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1987/9068/files/medaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5080/3099/files/possessive_nouns_exercises.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 4

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_off00007cd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD7 5020 bytes
SHA-256: a843497efcc7085faecf20633f7a0b578594b1fd458caeb1794fb7fdb928d050
font_01_sfnt_off00008dfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DFD 13044 bytes
SHA-256: f4d8aeb412e7d71954514840e95ff6c82961acac3123f9ea5be0e4d7d7af140d

Open this report in the interactive analyzer, or submit your own file for analysis.