Malicious PDF — malware analysis report

Static analysis result for SHA-256 e50168f3dc42e259…

MALICIOUS

PDF

35.9 KB Created: 2020-08-20 19:44:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5a3baa5e7620b2e50d3bdb4689f6dacb SHA-1: 4673af74983d05ea863aaf8f96ef43d8e78c3159 SHA-256: e50168f3dc42e25917b4b8a4abe68a2630064221b30be579c7bdf9e44c793f72
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body itself is largely obfuscated but contains the text 'Ang kaibahan ng tabloid at broadsheet' and a URL that appears to be the primary lure. The heuristic firings indicate the PDF is acting as a link farm, directing users to potentially malicious content.

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=ang+kaibahan+ng+tabloid+at+broadsheet In PDF document text
    • http://files.strongholdequineequipment.com/uploads/1/3/1/4/131438823/nepasa_bokobibig_fufatejikawonab_miwezuzarodefo.pdfIn PDF document text
    • http://radevu.oatfieldfarmandstables.com/uploads/1/3/0/7/130775443/tajaf.pdfIn PDF document text
    • http://files.sacpdm9.com/uploads/1/3/0/9/130969310/0db305feb36d.pdfIn PDF document text
    • http://files.teaching.yfolajimi.com/uploads/1/3/2/6/132696325/zeniburaninedem-lewup.pdfIn PDF document text
    • http://files.jimsv8vair.net/uploads/1/3/1/6/131636712/1818086.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/1/0434/2621/8134/files/pixenejuxigifudepinatu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3263/0680/files/suvonujimufetiga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7708/4070/files/marital_settlement_agreement_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6549/1107/files/ledusapemutebukibasove.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1547/0245/files/articulos_cientificos_scielo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6055/2085/files/31750033187.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9848/1564/files/46214198557.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2249/1553/files/871436405.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3455/0177/files/rivavago.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7709/8910/files/vagakibesugugijunok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4526/5312/files/67327060652.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2691/3179/files/bikini_body_guide_12_week.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_off00004d82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D82 5280 bytes
SHA-256: b73fe0465703b2d1449c81645adc809ca8548557d845684b38765ea548873bd3
font_01_sfnt_off00005f61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F61 10392 bytes
SHA-256: 9d309a5713d005cbd5db0f6b19c7f9ef3f594c259aef72c6d62ba9fb0090d162

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