Malicious PDF — malware analysis report

Static analysis result for SHA-256 7428eb979c97c99b…

MALICIOUS

PDF

42.3 KB Created: 2020-08-07 02:43:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d6525c3353d2c4a113b8813b2322049c SHA-1: 519aa9d6189a1ab460b25211af7cb6c94dd9b8b0 SHA-256: 7428eb979c97c99b27664ae0ef8cf7457481e1bcab5468b82b3979b05fe2f718
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, including one pointing to a known malicious redirector (ttraff.com). This redirector is part of an SEO link farm designed to lure users with terms like 'biofertilizers definition pdf' and ultimately lead them to malicious content. 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.com/pify?keyword=biofertilizers+definition+pdf In PDF document text
    • http://files.mtzinsurance.com/uploads/1/3/1/3/131398008/silopozu-zobuvijikijo-xovitotakufedom-vomexavimu.pdfIn PDF document text
    • http://files.myshopeclectic.com/uploads/1/3/1/4/131483778/3611258.pdfIn PDF document text
    • http://files.amfa4refugees.com/uploads/1/3/0/7/130740165/8467894.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/1/0433/0664/7717/files/kujifovorizew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/genetics_book_by_gardner_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5326/1724/files/xubivi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2858/6402/files/labutulujofu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4557/7116/files/41954409506.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3247/6838/files/82885650078.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2218/6656/files/abscesso_hepatico_pediatria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9359/9132/files/59747619388.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6369/6799/files/68760256792.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6217/3604/files/15967471068.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/2241/2958/files/awas_yojana_form.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_off000068cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68CB 4924 bytes
SHA-256: 6f510b80b8ac40189c0a064c92ee359a4e3cffffb113e2e2f9f562ba00e69240
font_01_sfnt_off000079a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79A7 10244 bytes
SHA-256: ebc268bd58f05acc9302bbaea1ad98a8182ef2117f28f870f81564732ae28da1

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