Malicious PDF — malware analysis report

Static analysis result for SHA-256 25ff50431351ba27…

MALICIOUS

PDF

66.6 KB Created: 2020-10-30 21:54:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: ab01bad1ed05da036a1bc32a672ebcff SHA-1: 31eddf7dda81c977ce6d8110264d2a023aa3a24f SHA-256: 25ff50431351ba272bafec3cabb6676f49659a5cd546678d246e42b9efc5425d
152 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with at least one identified as a redirector to known malicious infrastructure. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the primary purpose is to direct users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8292

Heuristics 3

  • 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.
  • 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/aws?keyword=portal+knights+coal In PDF document text
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/bijojabolopeme.pdfIn PDF document text
    • https://bizetuxerupa.weebly.com/uploads/1/3/0/8/130873791/550162d5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/2977/7565/files/bahamut_lagoon_feeding_dragon_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43403851-6a49-4852-8431-2801160ae77f/gorugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2473/5643/files/lededupusip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/3348/3204/files/we_could_happen_ukulele_fingerstyle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/0038/5695/files/download_youtube_videos_free_android_tablet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16f6f707-32c3-4ac5-a888-dfb4af6afae8/dolovasadotivoxukinisuja.pdfIn PDF document text

Related samples 3

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

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