Malicious PDF — malware analysis report

Static analysis result for SHA-256 661c9ca9fdb1a577…

MALICIOUS

PDF

43.4 KB Created: 2020-08-19 00:39:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 00d3da5d80957ddca841c81eabb6c1a1 SHA-1: d30e520fb75337fb31051072fe383ea051bb587c SHA-256: 661c9ca9fdb1a577f8fa6d87520f055d57d90d820cbc9987ff3574d453b0d914
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to malicious infrastructure, specifically a URL designed to appear as a free download lure. The ML classifier strongly indicates maliciousness, and the presence of numerous external links suggests a link farm intended to distribute malware or phish for credentials. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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=bethel+music+album++free In PDF document text
    • http://files.jeffmacauley.com/uploads/1/3/1/8/131856664/b61ec4c3c3857a.pdfIn PDF document text
    • http://mozagip.hccrs.org/uploads/1/3/1/4/131437130/4287986.pdfIn PDF document text
    • http://goxewevu.deadmandiscs.com/uploads/1/3/1/8/131872225/2893200.pdfIn PDF document text
    • http://kuvubuzif.countertopkings.com/uploads/1/3/0/7/130775934/9185857.pdfIn PDF document text
    • http://files.edmontonclimatehub.ca/uploads/1/3/1/6/131606159/818042.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/1/0429/8866/7034/files/37190946224.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8852/7013/files/angioedema_treatment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6021/3398/files/84651912028.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5927/2090/files/cul_de_sac_smash.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4119/3110/files/merajivixulawewaja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3062/3894/files/kevek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0809/7436/files/budejaxalokomokizonujuwes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6647/5164/files/guitar_chords_easy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4939/4080/files/43374992419.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 4

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_off00006b22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B22 5308 bytes
SHA-256: f8143919565c255edc161d80e72019e5a3b59e7a6fc6e804adb53ec9ead49430
font_01_sfnt_off00007d09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D09 10680 bytes
SHA-256: 1b19f5b1251d01282bc34d6b586c29a40d8815347c5065bdfd19b49cc532bfa4

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