Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a5bdefd4c4cd1b3…

MALICIOUS

PDF

41.7 KB Created: 2020-08-08 14:47:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 270e74c2b64bd6e3ac3ed1bd4d160a2e SHA-1: ac86012b9c5a816cf47e62b28d58c3c823326ddd SHA-256: 6a5bdefd4c4cd1b30003ad9f49713cb290d236caf0d2fe0cb7437ad7f9ed58b2
194 Risk Score

Malware Insights

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

The PDF contains a lure related to compressing files on Mac, but the embedded link directs to a known malicious redirector. The document body and heuristics indicate a large number of external links, many pointing to PDF files, suggesting a link farm or SEO manipulation tactic to distribute malicious content. The ML classifier strongly flagged this PDF as malicious.

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.com/wb?keyword=come%20comprimere%20file%20pdf%20su%20mac In PDF document text
    • http://xegalon.bikithikit.com/uploads/1/3/0/9/130969204/moxenuvafigazedu.pdfIn PDF document text
    • http://files.helenissocial.ca/uploads/1/3/1/3/131383483/wovolekafama_jafijug_nazadafinobe.pdfIn PDF document text
    • http://files.fryeins.com/uploads/1/3/1/4/131453615/vogake.pdfIn PDF document text
    • http://files.dresscodecracker.com/uploads/1/3/2/7/132710748/6264954.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/1/0428/9835/8432/files/6219719719.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0926/0190/files/rojazafij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0643/5232/files/lovufididix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7727/0692/files/resalunapemuxerezawoveb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8716/7641/files/99149265319.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7106/8577/files/ikea_kitchen_cabinet_sizes_uk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2247/3624/files/basic_english_grammar_third_edition_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/1295/1961/files/kenmore_400_dryer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7139/6257/files/chemistry_textbook_class_12_gseb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6828/3298/files/importancia_de_los_buenos_habitos_alimenticios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9618/7815/files/valanaraburefizuludaf.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_off000065d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65D2 5208 bytes
SHA-256: 5c8b824c3f06544d5cc38c1b2ef395f7d7d8453f54eb2f19cae1c85be59abfd3
font_01_sfnt_off0000776f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x776F 10048 bytes
SHA-256: 6a387a3de3cb83fc2d463cb617e35b2c78ad95528c558cf6d8a43f5dcab8f892

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