Malicious PDF — malware analysis report

Static analysis result for SHA-256 40230270aeb61524…

MALICIOUS

PDF

50.2 KB Created: 2020-07-28 08:45:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 32d259f45e09afc26c44f47c8bcc5b2a SHA-1: 82f0f7aa7e234e1ac725501862ba1c30166aa828 SHA-256: 40230270aeb61524221bba17635c18233c878124864e378120e75a084e89bc1c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to domains that appear to be part of a link farm designed to host malicious content. One critical heuristic identified a link to a known malicious redirector at 'ttraff.ru'. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains text related to trigonometry worksheets, suggesting a lure to disguise the malicious intent.

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=right+triangle+trigonometry+worksheet+13-+1 In PDF document text
    • http://files.hacklebarneyfarm.com/uploads/1/3/1/4/131437982/xufagoxejatoxememi.pdfIn PDF document text
    • http://files.harbor-club.org/uploads/1/3/0/8/130814110/144a2daf.pdfIn PDF document text
    • http://files.sweetlifeyogastudio.com/uploads/1/3/1/4/131453486/b3334032.pdfIn PDF document text
    • http://files.operaunlimited.org.uk/uploads/1/3/1/0/131070207/57f276138.pdfIn PDF document text
    • http://files.dynamichealinghomeopathy.com/uploads/1/3/1/3/131380600/dejoponidometo.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/1/0432/3740/8936/files/93041336846.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2681/6932/files/71709230078.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2556/3799/files/96219089639.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6900/4190/files/50838776449.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/94563890902.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6236/1245/files/degunijupomekawezejid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1240/7967/files/vokurunumezuxoxel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9755/4084/files/fezimevidigopufogubasalig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4879/6309/files/87611150001.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5904/3749/files/96324024842.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_off0000876b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x876B 5400 bytes
SHA-256: ec8ae80ac229cee71c7e726ee8a82b8091b176f285493f16dbb04d909447c5ef
font_01_sfnt_off000099bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99BF 9812 bytes
SHA-256: c4351ad2bbcd2f4155d20e66a1ad6d427be6161cf4a6c40dba14c38bf65aab72

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