Malicious PDF — malware analysis report

Static analysis result for SHA-256 984f3eaf44db3324…

MALICIOUS

PDF

41.2 KB Created: 2020-08-19 12:41:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d2788746284614d5b7bb7f1b35c94de1 SHA-1: 3f5a9ffdaf3b366b3d142e38de290a77c34fb0b0 SHA-256: 984f3eaf44db3324fbc3ae26352a350d3242a03ff19ed2f651cc4e92e9faa22a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with a critical heuristic firing for a redirector to known malicious infrastructure. The document body, though heavily obfuscated, contains a URL that matches the redirector. This suggests an attempt to lure users to a malicious site, likely for phishing or malware distribution.

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=free+a4+birthday+card+template In PDF document text
    • http://files.hillsviewmontessori.com/uploads/1/3/0/7/130775728/majomosa.pdfIn PDF document text
    • http://files.threegirlsquilting.com/uploads/1/3/1/8/131871864/fodulananinotezenuni.pdfIn PDF document text
    • http://files.shopmaisongreige.com/uploads/1/3/2/6/132695734/180898.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/1/0430/2694/0067/files/3d_maker_for_revit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8693/7253/files/54013162437.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7649/9096/files/serials_unlock_the_world.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2331/9715/files/xawojijijoxowul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4394/5628/files/wafeferarikurofi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0709/8529/files/mini_diagnostic_interview.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/47184882359.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6816/1176/files/lokoven.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2429/3794/files/87836754594.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/71299233386.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0453/4692/files/69540691858.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 6

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_off00006448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6448 5420 bytes
SHA-256: 973195f9af336b7a0d6cb41a480c29fddc2d1d32a0f9d94ac4a1e7c2d3dbe814
font_01_sfnt_off00007691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7691 9844 bytes
SHA-256: 986b2b634283520c5e1e2c4ba01d9c47bb60bc58add9b596d98059ea9908c0be

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