Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecc4ebb71a22ae41…

MALICIOUS

PDF

39.4 KB Created: 2020-08-23 09:02:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2acd51b87db16f092382a55c7825764d SHA-1: e32cdd8b8fcd86dd25a654b0872b9b265118edb6 SHA-256: ecc4ebb71a22ae41543a7490982ffd5c9bcde57bc7fd591ae08330e5b3b79997
194 Risk Score

Malware Insights

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

The PDF file contains a malicious redirector link disguised with a keyword related to learning German. This redirector leads to a link farm of numerous PDF files, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious, and the presence of a redirector and link farm indicates a social engineering attempt to drive traffic to potentially malicious content. No scripts were extracted, but the PDF structure itself is the delivery mechanism.

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=learning+german+for+beginners+worksheets In PDF document text
    • http://mutokada.epiphanysedan.org/uploads/1/3/2/6/132681218/vuladazo.pdfIn PDF document text
    • http://files.villa-anggrek.com/uploads/1/3/1/3/131379371/difisudenaborex.pdfIn PDF document text
    • http://files.yvonnedubourdieu.ca/uploads/1/3/1/4/131409677/legogunivefejek.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/1/0436/5382/4677/files/65064596811.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1174/2628/files/54039902427.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6706/4991/files/panegikanipafinanafirov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2144/2977/files/arduino_nano_3._0_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6044/5855/files/63688791879.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/wuzotozamav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/wubaxexojabidifirupuvu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41841620016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/7702/6201/files/16090984414.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5165/4047/files/bodomopus.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_off00005b8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B8B 5388 bytes
SHA-256: 422a8d570edae98c05a147fa5be547c6ea00dd1cb1e1a6d9bfe2cf9a344b7ea6
font_01_sfnt_off00006dce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DCE 10276 bytes
SHA-256: ba49d96350f6a22b84b7874d18007c61d4ecd8aa98117a179bdcfe650f20a508

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