Malicious PDF — malware analysis report

Static analysis result for SHA-256 622485de68a07023…

MALICIOUS

PDF

46.0 KB Created: 2020-08-17 07:58:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3583a6d5a267521ef333eab5c633f258 SHA-1: 2ade5e52064f580a063c25ca8ec1c6f142cd8a1c SHA-256: 622485de68a0702361488e66b30d2dc74a5847d00ce6c0a059392197e11f6723
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external resources, including a known malicious redirector. The document body, though heavily obfuscated, contains a URL that leads to a malicious redirector, suggesting an attempt to direct users 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.cc/pify?keyword=in+service+training+for+teachers+narrative+report In PDF document text
    • http://rimopuvux.cmcastillowriter.com/uploads/1/3/1/3/131380429/4101219.pdfIn PDF document text
    • http://nafatuma.jennycoffeycounseling.com/uploads/1/3/2/7/132710714/92081.pdfIn PDF document text
    • http://gudev.directinservicetraining.com/uploads/1/3/0/8/130874431/772184.pdfIn PDF document text
    • http://files.katherinegreenphotography.com/uploads/1/3/0/7/130776177/rivilibigazub.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/1/0428/6650/7943/files/jifuwiwozanumatizi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6424/5925/files/dbz_movies_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5946/8701/files/83015609432.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9915/9718/files/25501848693.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2804/6233/files/dorozunuzov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4642/8062/files/lezek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/dugid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3296/1439/files/depth_first_search_javascript.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9220/4950/files/jijifodowowab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4287/4278/files/the_alarm_band.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 3

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_off000076d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76D1 5240 bytes
SHA-256: b850251cb378ba069b361c4990c8bf68ef4d08a25228500b8c618da7e5d64643
font_01_sfnt_off000088a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88A8 10080 bytes
SHA-256: 1db20fd04e689d70bf808dd722b4cd79eec40883fba5818a065f8b26ef545ba7

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