Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cba05e1b4e74ab3…

MALICIOUS

PDF

60.3 KB Created: 2020-07-16 23:47:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 68cc17401610d0a89fbac525e56393b4 SHA-1: 31f3fdfc51525601c1cda4738c4469b697f3157a SHA-256: 1cba05e1b4e74ab3dddb25d004446b5a92cb5dd8efde5d8948434aefa66009f6
192 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to a high number of embedded links, many of which point to redirector infrastructure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates a direct link to a known malicious redirector, and PDF_SEO_LINK_FARM suggests a large number of external links, likely for SEO manipulation or to distribute further payloads. The document body is heavily obfuscated and unreadable, providing no further context.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9742

Heuristics 4

  • 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.
  • 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/wb?keyword=the%20ontological%20argument%20pdf In PDF document text
    • http://files.dulceyeseniarodriguez.com/uploads/1/3/0/8/130813931/fupap_lanumajumofamo_sikejemakugeni.pdfIn PDF document text
    • http://files.gillysplaceinkefalonia.co.uk/uploads/1/3/0/8/130813667/3983028.pdfIn PDF document text
    • http://files.pooleknobsretrievers.com/uploads/1/3/0/8/130873804/8272239.pdfIn PDF document text
    • http://files.carecounselinglv.com/uploads/1/3/0/7/130776016/pakolobarinoveloxu.pdfIn PDF document text
    • http://files.ttastelier.com/uploads/1/3/0/7/130776401/sokaguzofokikezit.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/1/0428/7945/1289/files/tiwafolibono.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2805/4169/files/44097998618.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5180/3033/files/kenavi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fesulemenakasisot.pdfIn PDF document text
    • https://ketadotab117676792.files.wordpress.com/2020/07/10283098730.pdfIn PDF document text
    • https://nodifewabala.files.wordpress.com/2020/07/fipet.pdfIn PDF document text
    • https://ribuvez186628289.files.wordpress.com/2020/06/japedorosisuboxuminusijoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7519/9391/files/33999877488.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/begavalinuvuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7353/5138/files/nifalafatawoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/42778697636.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1142/3902/files/10687740685.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2469/4942/files/72290952875.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0687/0183/files/36210971745.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC821 5220 bytes
SHA-256: 8e4dd0f945e7fec138e348439b64db2bf239e5cabd763921200c4e60145cd6bc

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