Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dbab98419b6da58…

MALICIOUS

PDF

38.8 KB Created: 2020-08-06 02:48:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b8b8b21a8f2e8490fe405c8290335857 SHA-1: 3e35c8a96681b7f9d84eada6beb7373afa25b9e4 SHA-256: 4dbab98419b6da58e59ff8af2749bc909779686d0dad6600b1b80d65f7b0ca55
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many of which point to a redirector service known for malicious activity. The document body and heuristics indicate a lure for users to download a PDF, likely leading to a phishing or malware download site. The ML classifier strongly supports the malicious verdict.

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=reglage+carburateur+pdf In PDF document text
    • http://files.altenergytrump.com/uploads/1/3/1/6/131606362/zidefetewodoza-sajiwiwosu-wupanekegeme-wibegoj.pdfIn PDF document text
    • http://files.lacombenajac.com/uploads/1/3/0/9/130969879/najixax-kasabebew-gexuguzufax.pdfIn PDF document text
    • http://files.aedt4200thesiscourse.com/uploads/1/3/1/3/131398334/6080643.pdfIn PDF document text
    • http://bidez.tylerleighnicholson.com/uploads/1/3/0/9/130969472/7030063.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/1/0434/4391/2856/files/36018542125.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6710/3645/files/70268429068.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8558/6849/files/wiraguguvusewazumo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3863/8241/files/batowemafotuxuxan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5308/6885/files/23334531627.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9389/4044/files/23187800898.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2525/3023/files/kesepaxawidakarujujuni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kekesapenogetiru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3629/5836/files/98447017896.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5109/0077/files/78049452236.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/xitafozuxilidezox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2240/1192/files/36986509109.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_off00005bb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB3 5292 bytes
SHA-256: f5bfb46712b8a07ec6d633d495f677bc5a40a13831c3925d9a584afe83aa858c
font_01_sfnt_off00006dc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC8 9660 bytes
SHA-256: c58566a4b71eae9b820b432f4d1bf22813094955af21f40fcc01a2d6447864b8

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