Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7b8f821f7619552…

MALICIOUS

PDF

24.2 KB Created: 2020-10-26 08:43:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: b38a0d78c1d60e64b4755cc55c151a89 SHA-1: a6f696e9039c3efdf45bfc6c0d90e0a31d331f55 SHA-256: a7b8f821f76195525f29a4f43d00e0882a8d562be2005438ad880af3c5ecc73e
192 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically a redirector designed to lure users into downloading potentially unwanted or malicious software. The presence of multiple SEO-optimized PDF links suggests a link farm tactic to increase visibility and click-through rates. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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.com/pify?keyword=archos+video+player+pro+10.2+apk In PDF document text
    • https://vopevejefed.weebly.com/uploads/1/3/1/6/131606133/6941374.pdfIn PDF document text
    • https://sejejuno.weebly.com/uploads/1/3/4/4/134447194/dazubetafele.pdfIn PDF document text
    • https://rusokupos.weebly.com/uploads/1/3/4/4/134468665/papivinaludobab.pdfIn PDF document text
    • https://vonubaxuted.weebly.com/uploads/1/3/1/4/131452839/c49d0ae26a59c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369766/normal_5f8982510a067.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381082/normal_5f92e2a28bae8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369904/normal_5f88628a5e0fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365576/normal_5f87409e0185d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366311/normal_5f872acd202e6.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/totizivuw.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/atharvana_vedam_in_telugu_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/decameron_giovanni_boccaccio.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/kenichi_ohmae_borderless_world.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/biodata_format_download.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/kizijutipegesofudifeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83cabc74-25bf-4570-aa8d-2e163b0a5046/fuxebesudejuwefokijujom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/544a9d15-801a-4d1c-a505-6b00c7b4e8e3/volume_by_cylindrical_shell.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f06aa91c-1d4b-4c3c-a0da-d9d50615c99d/winaridif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73d3545e-12aa-4396-811e-18d97be9b545/bokosope.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80439f86-afc8-4798-ac2b-7df84e786a24/wumusitoritevus.pdfIn PDF document text

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