Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a744b34b36f761f…

MALICIOUS

PDF

45.8 KB Created: 2020-08-06 15:03:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a3016fbb8bad6c25b52511fbfb102856 SHA-1: 1de149a6be08441f52d4732b71c08b366bc9db1a SHA-256: 7a744b34b36f761ffd2fa7bd6db3c8073f718822d1d0599e8a4def15e450ae84
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains a URL that appears to be part of this link farm, suggesting a phishing or scam attempt. The ML classifier also strongly indicated maliciousness.

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=dipleurula+concept+of+origin+of+chordates+pdf In PDF document text
    • http://files.snowsbendfarm.com/uploads/1/3/2/6/132681694/42f7418.pdfIn PDF document text
    • http://files.wooddragonadvising.org/uploads/1/3/2/6/132681062/1373169.pdfIn PDF document text
    • http://files.mi928.com/uploads/1/3/0/7/130776295/nojixemipejokupokud.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/1/0433/6159/9656/files/80401424826.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6335/3244/files/nugujesisixulobulebivori.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5522/6773/files/pukejitiladekos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7808/9878/files/73928871575.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/novorubafiwani.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4903/3627/files/1485483374.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3562/3578/files/dasep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8814/9668/files/bungsaufgaben_ableitungsregeln.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9296/7581/files/jofif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9448/1821/files/vadurapokezum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1783/7467/files/xagas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7272/4892/files/betuwavetuvunilobavem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6249/2325/files/texux.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_off000074d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74D9 5416 bytes
SHA-256: 7d6660fa036d5a3c39eeca432eb06481c2367e9e392ba414fa5ee25ef9181e61
font_01_sfnt_off00008741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8741 10248 bytes
SHA-256: 0a48365655dd2fb4648d5558d0deab5bb60e965aa410dc510b0d4386c3419f2f

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