Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dca9cde1fe83602…

MALICIOUS

PDF

44.5 KB Created: 2020-08-22 09:09:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3a8a34ff4969798d281a1a7df1efb296 SHA-1: f15ad56827952f50275bc915751551e0bf6cbd02 SHA-256: 4dca9cde1fe8360247117a49777ad9cb978efb08836212c3bdad436f69b8dd17
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic firings indicate that the document is designed as a link farm, likely for SEO manipulation or to distribute further malicious content. The presence of numerous links to external PDFs, including one pointing to `https://ttraff.cc/pify?keyword=contaminacion+por+microplasticos+pdf`, suggests a coordinated effort to drive traffic or compromise users through indirect means.

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.cc/pify?keyword=contaminacion+por+microplasticos+pdf In PDF document text
    • http://files.nativitybruins.org/uploads/1/3/0/9/130969057/kibeviviru.pdfIn PDF document text
    • http://sozowo.atowncenter.org/uploads/1/3/1/6/131607063/3e3154ebe748.pdfIn PDF document text
    • http://files.kristiekvuocolo.com/uploads/1/3/1/4/131407148/4932d.pdfIn PDF document text
    • http://files.myhealthandwellnessmatters.net/uploads/1/3/1/4/131410545/ee69d1d78.pdfIn PDF document text
    • http://files.midmittencrossfit.com/uploads/1/3/1/3/131384604/meresopon_luponimikil_zatigapow.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/1/0427/9291/1007/files/xobusatefezesozasef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0971/2021/files/86511812459.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3242/0262/files/central_dogma_of_protein_synthesis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8982/9800/files/potuxiziriluz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9600/7065/files/womaritan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3477/1610/files/figarel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2423/6199/files/lodubapumu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5049/2316/files/nezevijuwexazejovesitiji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5848/7703/files/saudi_quran.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6260/7520/files/mewadigetokebu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8491/3565/files/77002137244.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 5

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_off00006cc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC5 5208 bytes
SHA-256: 2351ca84db70642d973235c9a4d698849c0cfd39cd700cbbc933768671793a10
font_01_sfnt_off00007e51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E51 11328 bytes
SHA-256: 04b0852c935f114f00d3eaa935333dc796f285cd8a114756aa99eae0cb8ae541

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