Malicious PDF — malware analysis report

Static analysis result for SHA-256 84b7f72beb57b7d1…

MALICIOUS

PDF

26.2 KB Created: 2020-11-02 19:42:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71d0dfd04553923233dfa4a93e94a1a8 SHA-1: e893469135af76624f34dbea509d5d5f833c9c3b SHA-256: 84b7f72beb57b7d1bebd48bcab3bc6851c20fa4a0ba70b483a3727b83bae35cf
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF is designed as a lure, using a "screenshot" of a book title to entice users to click a link. The embedded link, https://cctraff.ru/strik?keyword=free+chemistry+the+central+science+pdf+14th, is identified as a malicious redirector. The document's structure and the presence of numerous external links suggest a phishing campaign aimed at redirecting users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 26 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://cctraff.ru/strik?keyword=free+chemistry+the+central+science+pdf+14th
    • https://cdn-cms.f-static.net/uploads/4421048/normal_5f98d1590aad6.pdf
    • https://cdn-cms.f-static.net/uploads/4423430/normal_5f97f1683d03c.pdf
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/1158663.pdf
    • https://uploads.strikinglycdn.com/files/853e51d0-6bad-4c38-8226-c5a865903484/61904618967.pdf
    • https://uploads.strikinglycdn.com/files/ce339eb2-e3dd-4c6c-adb5-02b2af77a069/40767496179.pdf
    • https://s3.amazonaws.com/fosawef/brinkmanship_cold_war.pdf
    • https://uploads.strikinglycdn.com/files/43177032-c6e2-48a9-b42a-182982376393/jamoxevuwizabovebonuvi.pdf
    • https://uploads.strikinglycdn.com/files/df53fce8-14a4-44f6-b203-fa26ab73bb87/hotspot_shield_7.15.1_crack_free_download.pdf
    • https://s3.amazonaws.com/vawoginele/jigopamivujiram.pdf
    • https://uploads.strikinglycdn.com/files/b22e0235-b089-4955-a95d-3751629c52dd/rev_style_guide_captioning.pdf
    • https://uploads.strikinglycdn.com/files/856283d9-b695-46e2-a3d2-af0e25d8da0c/bediraboguju.pdf
    • https://uploads.strikinglycdn.com/files/a87f10cf-bf15-4b62-853a-ecc2125c4f44/venufe.pdf
    • https://uploads.strikinglycdn.com/files/d249bf33-6a83-4b86-8b76-e2ed177672e0/62242173798.pdf
    • https://uploads.strikinglycdn.com/files/7141b3cc-44da-46fe-8276-3a82d7460b17/loneponomixutis.pdf

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