Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1cf1915be155724…

MALICIOUS

PDF

68.8 KB Created: 2020-08-04 00:18:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f64cf8e3174da77ae6b6d4a2897131ed SHA-1: ee0be1fe90bc22c103f0f8d7d1fa36bffa2f0c1c SHA-256: a1cf1915be1557247aeb4e3dd37a5d091727cc3ada7a8ff9d749d5ae64cca4ce
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm and a specific malicious redirector URL, indicating a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious. The embedded URL points to a redirector that likely leads to further malicious content or phishing pages. The document body contains the malicious URL, reinforcing the lure.

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=auditing+assurance+services+and+ethics+in+australia+10th+edition+pdf In PDF document text
    • http://files.houndheritage.org/uploads/1/3/1/1/131163684/falunudugipa_badusin_nenepine.pdfIn PDF document text
    • http://files.marylinmusic.org/uploads/1/3/2/7/132710779/zulejir-wesoweru.pdfIn PDF document text
    • http://files.doodletonranch.org/uploads/1/3/0/7/130776644/7269133.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/1/0432/6978/3720/files/vatesuwerulo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8583/1070/files/571364908.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9832/4638/files/puvufelavufexemuwuwos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1107/9317/files/61056731810.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2762/0249/files/brew_link_permission_denied.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8280/0542/files/xuwid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4923/8178/files/60063089415.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3455/7088/files/rijusi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6329/5646/files/99247633550.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8065/5775/files/zajege.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3822/0181/files/geankoplis_solution_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96226605796.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 2

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_off0000cc08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC08 5660 bytes
SHA-256: ca3f3c2e53ec1611a8f6818edbc8d090c89bacc47df65987e78d348183497ac1
font_01_sfnt_off0000df53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF53 11436 bytes
SHA-256: 1c326bb5b7d58ebefe7fbcf98149c92a4c3d0adf24352eee527054d19699fa9f

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