Malicious PDF — malware analysis report

Static analysis result for SHA-256 b938917d6421f741…

MALICIOUS

PDF

36.0 KB Created: 2020-08-07 22:46:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9ed9c55e8b4087d4bced24d612690cc4 SHA-1: e1454194047af7d08f18c6eeb023f752b909cfa6 SHA-256: b938917d6421f7416bbf5eb5cb905cfc92b4963c238e03d068f0e447732690c3
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a mass external link farm, with a primary malicious redirector URL disguised as a dictionary download. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates the primary URL leads to known malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF. The document body, though heavily obfuscated, contains the malicious URL and references to download a dictionary, reinforcing the phishing lure.

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=dictionary+english+to+urdu+free+download+full+version+pdf In PDF document text
    • http://files.ulstl.com/uploads/1/3/0/7/130739786/kudinekokomi-rigugiv-mokakakewiv-gasugu.pdfIn PDF document text
    • http://files.geraldsandau-sculpture.com/uploads/1/3/1/0/131070633/9625127.pdfIn PDF document text
    • http://files.matakanacommunitygroup.online/uploads/1/3/1/3/131384070/6366111.pdfIn PDF document text
    • http://files.epicministry.net/uploads/1/3/1/3/131384432/junil-pojawok.pdfIn PDF document text
    • http://files.politicaltoons.net/uploads/1/3/1/4/131483009/gofixixivojo_bomusuw.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/1/0430/4610/9345/files/dalujipuvoxafimoxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7513/2824/files/28919028145.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/77636621448.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/lugozugaxatudinu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1619/2153/files/wagner_bridal_chorus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7140/6234/files/nagatumuxadanuval.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2732/3301/files/23729175080.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/42050550547.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8049/8841/files/96391847070.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0877/0726/files/zuxasebuzejibi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1570/8580/files/27434115117.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_off00004dfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DFC 5668 bytes
SHA-256: 66feee10f139eb81b328daefd305eec337e8ce7605309cf938cb485364146626
font_01_sfnt_off00006168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6168 9652 bytes
SHA-256: 341ba9ae23bce5a5da25625c0dc0e43fb130a96ad1d3691c07f142870a2d0f50

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