Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d4cd5d8a386e7c3…

MALICIOUS

PDF

55.5 KB Created: 2020-07-31 10:47:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a688d3318998a3e7b6ba9800d4565834 SHA-1: cbf72dbde8638c42507f807edef35d8005720fa0 SHA-256: 7d4cd5d8a386e7c3951ec71a4516203464d0270610a1ab400aabde3b2d771dc6
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, suggesting it's designed to drive traffic to malicious sites. The embedded URL points to a redirector that is known to be malicious. The document body, though heavily obfuscated, appears to be a lure related to 'calculus ii problems and solutions 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.ru/pify?keyword=calculus+ii+problems+and+solutions+pdf In PDF document text
    • http://files.beautifuleggsbyjane.com/uploads/1/3/2/7/132712006/zogubawovi.pdfIn PDF document text
    • http://files.wwvmc.net/uploads/1/3/1/4/131409090/wogigomak_dawevajuvezo.pdfIn PDF document text
    • http://files.noellegracephotos.com/uploads/1/3/1/4/131437380/wonolebinonivow_nudozez.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/1/0432/6585/1542/files/somunojoduzujebudanixe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2247/3624/files/wefolagimi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8673/1681/files/kagasatagiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8056/2326/files/39212458911.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7967/9656/files/71196208961.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8245/7000/files/95258496341.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5523/4710/files/kekofovoworuxojazowi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0742/7238/files/55563973371.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7835/2034/files/97931422625.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9147/6133/files/fodukerofemizabupigizose.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4375/0049/files/jifitipuxadarovitojajek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zadolodiwifunum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0002/1667/files/tevarebu.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 7

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_off00008feb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FEB 5344 bytes
SHA-256: 386a8dc4430ccd26668f9be242df65e298fb24727ec9bdf6d546b328102a8670
font_01_sfnt_off0000a1f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1F2 15056 bytes
SHA-256: 258db5bac9f79144682384279a3eb57d66704deba9b7dd1ed5f3b397bd8319d7

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