Malicious PDF — malware analysis report

Static analysis result for SHA-256 7529dad7f5ef2880…

MALICIOUS

PDF

38.2 KB Created: 2020-08-06 22:24:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 834d5876801d0268311d4c66e0b782c8 SHA-1: 839f3606234cfbcb8dec3d8bb96e8bbe6bdecede SHA-256: 7529dad7f5ef2880090dde15db3c3c1e736534706d006fff6120d6353c4e03c4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service that ultimately leads to malicious infrastructure. The document body and heuristics indicate a lure for free downloads, likely a phishing or scam attempt. The ML classifier strongly supports the malicious nature of this PDF.

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/wb?keyword=practical%20psychology%20for%20pastors%20pdf In PDF document text
    • http://files.aminzargar.com/uploads/1/3/1/6/131606262/6cc9bf4dc8f62.pdfIn PDF document text
    • http://files.soniapalik.com/uploads/1/3/0/9/130969061/c6f2c.pdfIn PDF document text
    • http://files.honouringourbundles.com/uploads/1/3/1/4/131438241/529485.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/1/0429/4692/0615/files/72801549766.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3882/6908/files/pimorutet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1024/3229/files/19205836296.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8460/3801/files/19900809770.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4910/6080/files/39084179296.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3005/2005/files/zinevoxoviz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7188/7767/files/holy_bible_amplified_version_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7237/3411/files/anestesia_epidural_elsevier.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7664/9124/files/teora_del_materialismo_histrico_bujarin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bofudajix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7217/3733/files/80553385292.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_off000055ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55ED 5520 bytes
SHA-256: acd5b4c0c53036b63fce7549a62ec1b775cebb3c0ab6d497e34756e8313ff279
font_01_sfnt_off000068b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68B1 10652 bytes
SHA-256: 488c59d760899665b7b4471a9298d28502546906af24aee1500b6dd2a1e708c0

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