Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ae9358146b42323…

MALICIOUS

PDF

42.9 KB Created: 2020-08-23 01:22:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fff7d119517c3a9ab76010e6005bc92e SHA-1: c64c9fc133a20b5e1bce2ee091b8df8988eea432 SHA-256: 5ae9358146b423235675a3c855e8fedd417bc3b46bc38f0ccf49ea2973c666f6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a malicious URL, which then leads to a large collection of other PDF files. This behavior is indicative of a link farm or SEO manipulation tactic, potentially used to mask malicious activity or drive traffic. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector.

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=website+design+quotation+template+doc In PDF document text
    • http://files.stjepanpepiskuric.com/uploads/1/3/0/7/130738548/2920330.pdfIn PDF document text
    • http://files.southernmainewritingproject.org/uploads/1/3/0/7/130775830/zovaluvi.pdfIn PDF document text
    • http://famap.swim-for-all.com/uploads/1/3/1/6/131637814/wuwud-wavolufasutu-liluminavojumin.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/1/0441/1280/6040/files/lisakukujekutosu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8170/9206/files/47450429770.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1535/6067/files/garth_brooks_discography_torrents.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4610/9345/files/26329011456.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/9041/6550/files/nitro_cloud_to_word_convert.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/2638/5829/files/63021985855.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2917/6232/files/who_causality_assessment_scale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7079/9510/files/44110733146.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/4853/3917/files/3806074473.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7663/9134/files/jinja2_load_template_file.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7012/8277/files/gevaratokoti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5671/7224/files/2266788035.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_off000067f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67F2 5576 bytes
SHA-256: 210692dca11dc1b3e02ad50c561aea417f330117fc9060f410e6f01709623bca
font_01_sfnt_off00007ad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD0 10608 bytes
SHA-256: 6f3143fe4e82e4521b3969e93bd8bc8f28a9e1e93ca87be4340f0947abcfd3d4

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