Malicious PDF — malware analysis report

Static analysis result for SHA-256 5953fe4578390153…

MALICIOUS

PDF

74.9 KB Created: 2020-08-04 04:42:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: da53935d48df993f221edc19c6d39ec9 SHA-1: e8aca1405e4a44f3f765a01cd845da10d9a83a19 SHA-256: 5953fe457839015344b170edb6d1c611f216c586f9b8482af4679bd7bcf9e124
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a significant number of embedded links, with a critical heuristic firing for a PDF link farm. One of the primary links points to a redirector URL, suggesting a malicious intent to lead users to harmful content. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the sheer volume of links and the redirector URL are strong indicators of a malicious SEO or redirection campaign.

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=valpakine+200mg+ml+bula+pdf In PDF document text
    • http://files.aggiesigns.org/uploads/1/3/0/9/130969231/fapiduwubaxajez_nenenumekodogu_wezade_japunad.pdfIn PDF document text
    • http://files.berkelab.com/uploads/1/3/1/4/131454436/tefarebenanubigo.pdfIn PDF document text
    • http://files.morrisseauartist.com/uploads/1/3/0/7/130738915/6487044.pdfIn PDF document text
    • http://files.semitourist.com/uploads/1/3/0/7/130739122/61ab2b72.pdfIn PDF document text
    • http://files.allentertainmentuk.com/uploads/1/3/1/4/131454549/9dcf660d497c1f.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/1/0438/2710/1853/files/nobusojisowezobod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2823/1830/files/download_lucci_56_nights.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5597/1492/files/vijodozivukupulap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4216/9244/files/7490326432.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3562/1526/files/4344587970.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7727/1716/files/49537155228.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2412/9952/files/lofujabonebenumizomij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4470/9276/files/sogibunaroguvewowut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1637/9816/files/dotadimubazid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4828/7912/files/nupetowa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6965/1606/files/4656164349.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_off0000e753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE753 5528 bytes
SHA-256: a0c73370b8cd01c9f903e82dfe037ba1fcdcf165941fb19699798e088201bfd1
font_01_sfnt_off0000fa1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1F 10684 bytes
SHA-256: 4074b3137130216c7aafb1585832eee2745ebfaf47a662dbf5bd5c28285d2e30

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