Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1d25b575454a175…

MALICIOUS

PDF

43.4 KB Created: 2020-08-08 05:53:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 45b73de74c5d9d8594aa8c9ab46d8f91 SHA-1: e87d76f8df3bf9aa8b0b6ac70a9a529e094f83a9 SHA-256: c1d25b575454a175877d7b1803b4d55a9310e2eacf5a884c4c9404d2f64c95c1
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as legitimate PDF documents, but one of the primary links redirects to a known malicious redirector. The document body, though heavily obfuscated, contains text related to IELTS preparation and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of multiple external links, many hosted on Shopify, indicates a link farm strategy to obscure the final malicious destination.

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=s%25C3%25A1ch+ielts+ng%25E1%25BB%258Dc+b%25C3%25A1ch+2020+pdf In PDF document text
    • http://files.villageofpound.com/uploads/1/3/1/3/131384127/6999905.pdfIn PDF document text
    • http://files.christchurchaylmer.ca/uploads/1/3/1/4/131406811/8673870.pdfIn PDF document text
    • http://files.deannaheathrealty.com/uploads/1/3/0/7/130739232/lejororetupom.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/1/0430/4879/6309/files/garepon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8800/2710/files/35701091912.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2417/0664/files/26560510620.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5795/4467/files/mosexakevuveditefu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8068/6491/files/quimica_peter_atkins.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7341/3032/files/jajino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9963/4328/files/70178310109.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/8127/4278/files/kalispell_police_blotter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4979/4213/files/33847268867.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6431/0425/files/reason_and_responsibility_14th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4914/0902/files/10179776128.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9958/4664/files/63976230546.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1755/2543/files/fazonoxolowaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4444/6118/files/36409078274.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 5

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_off00006731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6731 5988 bytes
SHA-256: b27dea1dab31fa37afebf05cfb4de785aa2840cb0b66872b2c913861a32cd582
font_01_sfnt_off00007b54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B54 10544 bytes
SHA-256: fd54bf2abe5d8cdaf4be5aa2822b8690f438c67088ed8d0279ab91e27c4a81f5

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