Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef79e6ca9f330c4b…

MALICIOUS

PDF

34.0 KB Created: 2020-08-17 14:29:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 167e71687e36d6593956555e48bc4f3b SHA-1: 0b67a41090a7cabfc60aa702ba975bccaaaa4d60 SHA-256: ef79e6ca9f330c4b396dcb955765c233500a9692f37455e2631f60bc1760c5c4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to domains associated with link farms and redirectors. The document body, though heavily obfuscated, contains a URL that is also flagged as a malicious redirector. This suggests the primary purpose is to direct users to malicious sites, potentially for SEO poisoning 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=anari+full+movie+song In PDF document text
    • http://files.mondellis.com/uploads/1/3/0/9/130969300/dc10f590c6849.pdfIn PDF document text
    • http://kilatojar.thelovebirdsweddings.com/uploads/1/3/1/0/131071114/6194710.pdfIn PDF document text
    • http://files.caterpillarcorner.org/uploads/1/3/1/3/131383377/lujadefikub.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/1/0434/0151/1068/files/mixozerokenotomuroji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/1398/4671/files/cabalistic_magic.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8573/9685/files/fusionner_les_en_un_document.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8870/5688/files/wii_ware_wad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3564/0487/files/turixidatunimisu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0635/1771/files/3369567189.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3404/8669/files/465461919.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2935/6959/files/sejowuxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3336/9503/files/17176912298.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7727/0692/files/34457283804.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4944/1687/files/best_free_spyware_removal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5598/8374/files/29317245260.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kofuka.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 1

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_off00004678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4678 5136 bytes
SHA-256: b13367c69cdbe6672a869e45832b111764f5ecda85e6ff25472f98408558cd03
font_01_sfnt_off000057df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57DF 10032 bytes
SHA-256: 287b9d60ba586d6b320a36ef7c4b0bd0427373a2277dce68204f802dc67ce8cc

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