Malicious PDF — malware analysis report

Static analysis result for SHA-256 19eeb402fadc0876…

MALICIOUS

PDF

44.9 KB Created: 2020-07-29 20:26:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: efe90db5ef3cb695d758919afd3b78f1 SHA-1: eeef261d289df6f6979188b49c2cc3b7769c76f9 SHA-256: 19eeb402fadc087603ad2b1da65496e2a4709df0f5e1216f4b26004a03049000
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, with the primary link pointing to a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting an attempt to manipulate search engine results or distribute malicious content through a link farm. The ML classifier strongly supports the malicious verdict. No scripts were extracted, and the document body is heavily obfuscated.

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=5+characteristics+of+a+good+research+problem+pdf In PDF document text
    • http://files.theperfectpairdolphintrilogy.com/uploads/1/3/1/4/131453823/ba8208d48f81dc.pdfIn PDF document text
    • http://files.kootsadventure.com/uploads/1/3/0/7/130739696/d2eb6a2786c73.pdfIn PDF document text
    • http://files.ryanshay.org/uploads/1/3/1/8/131859261/jopulekenuw_mabisefamaxuza_nawirovoxemi.pdfIn PDF document text
    • http://files.puertoricanparade.org/uploads/1/3/1/3/131382217/272f61714.pdfIn PDF document text
    • http://files.smestheatre.com/uploads/1/3/0/9/130969506/8218582.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/1/0433/0687/7080/files/62092070186.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6271/2734/files/loxifafatodefaropegug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/17721531589.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3387/8940/files/zuzipekipijaxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vunumegosuvuvorewufo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4949/2384/files/20600653743.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5470/3526/files/58463109795.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/wawamamufufotijufekegipe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3730/1653/files/71796226382.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8580/7269/files/85708314441.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9542/4165/files/93337496199.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 8

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_off000072dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72DD 5420 bytes
SHA-256: e38b9872e544fdeab5abe5eaffdb9003d2f5612f59ae697012a49d5fcb70a6bd
font_01_sfnt_off00008544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8544 9752 bytes
SHA-256: b94268e0c377d2e1b7d0043f7e41b177aae2747bd3055b81f3520a99d1ec5775

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