Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4125cc6c80f081a…

MALICIOUS

PDF

41.9 KB Created: 2020-08-10 05:53:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 071c6cddb59ccf19a208a8e1ef8d4d04 SHA-1: 0b4dbfa6a9201ea4ba640555895c17f655947002 SHA-256: d4125cc6c80f081a9a7ad880e7a485180e4ca6f2cbd38e811571d69bd8d8716d
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically identified as a malicious redirector. The heuristic firings indicate this PDF is part of a link farm, likely designed to manipulate search engine results or lead users to malicious sites. The ML classifier strongly supports the malicious nature of this document.

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=factors+of+digital+divide+in+south+africa+pdf In PDF document text
    • http://files.marker99.com/uploads/1/3/1/4/131406337/jogofasu.pdfIn PDF document text
    • http://files.lighthousechurchathensny.net/uploads/1/3/0/8/130874284/87a65a6c32.pdfIn PDF document text
    • http://files.imablumm.com/uploads/1/3/1/3/131383297/belaxaralux.pdfIn PDF document text
    • http://files.countertopkings.com/uploads/1/3/2/6/132681308/6023668.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/1/0427/8052/4710/files/25669568164.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2819/3184/files/xiluzedegita.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0963/7533/files/bafomesewujuwudetorox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7676/4327/files/regadolige.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1434/8197/files/84617133736.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4529/8077/files/lisalirinuduginelikomejop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4726/3128/files/78857616417.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/93747596128.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1030/8765/files/zizozog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3957/2643/files/11003435720.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7199/5033/files/75740180974.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2588/2518/files/bakomiderotef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2240/1185/files/31717025539.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 7

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_off000065ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65CA 5432 bytes
SHA-256: 4c84324ad04f0e824c71e70ef9ece2b207a45e5ceca902520f294b71e219c4f8
font_01_sfnt_off00007848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7848 10204 bytes
SHA-256: 1baa5ec4e433b1859855af630fc57560f5713505d2bfce42aff5b92db570b603

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