Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c314fbd25a2377e…

MALICIOUS

PDF

41.3 KB Created: 2020-08-05 13:16:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 943b3f7aa7281afe6a9c7d63e3cad8d3 SHA-1: 6632b9eade27632e108465df67135d7f3990d576 SHA-256: 6c314fbd25a2377eccb489700aa20b9b6d70a5c1f1374bffb849649e20eea212
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics. The ML classifier also strongly flagged this PDF as malicious. The primary IOC is the redirector URL, which is likely used to host or chain to further 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.com/pify?keyword=algorithm+and+flowchart+notes+pdf In PDF document text
    • http://files.balloontwistersdcvamd.com/uploads/1/3/0/9/130969375/gipagazovupibiz_tolokaduwimola.pdfIn PDF document text
    • http://files.basbogaerts.com/uploads/1/3/1/3/131398036/9e7d04038ea0766.pdfIn PDF document text
    • http://files.hondurasmissions.org/uploads/1/3/1/8/131872037/zixavitobesone.pdfIn PDF document text
    • http://files.hight.nz/uploads/1/3/0/7/130775223/vijeke.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/1/0430/8851/1125/files/40091475462.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4021/9037/files/php_convert_array_to_string.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40035930655.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7121/7565/files/jilaruwutijoseterajagane.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7788/6367/files/luxunofufegaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8212/1377/files/jonosisaviru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7227/5103/files/nobokaraletawametube.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4434/6792/files/tinuxafafiporafapoxikez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9124/5733/files/jinejivem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wevanedinuwisuvajolow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2154/1271/files/53941205509.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_off00006203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6203 5652 bytes
SHA-256: c5bb50e817f7a50619c2760b0aef63eb942dcec72ee15d85613d91fab2e5d66f
font_01_sfnt_off00007521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7521 10344 bytes
SHA-256: 01b06142019fd504d031e37fcafaf00de050a2b092d23066dd9e3dda748dd5c2

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