Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc1e579966f40bd1…

MALICIOUS

PDF

45.9 KB Created: 2020-10-28 11:40:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b26a3fbd4cc07cd1cdd97d719ab73745 SHA-1: df2022e09090987c24af97eaee6de3a66179fe29 SHA-256: fc1e579966f40bd121321c80859dba4e228231688dad01b4a76dd71e3d774708
162 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.club/123?keyword=rip+van+winkle+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367275/normal_5f87d288b4da3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387050/normal_5f97bebf93ddf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385213/normal_5f8fb178c734f.pdfIn PDF document text
    • https://xebikazogede.weebly.com/uploads/1/3/2/7/132740990/rugenefenepufemaseg.pdfIn PDF document text
    • https://rigafefabapamum.weebly.com/uploads/1/3/4/4/134486683/45ef2b7.pdfIn PDF document text
    • https://paxiguvemogi.weebly.com/uploads/1/3/4/3/134317910/lujepojuwep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/asrb_net_old_question_papers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/2568/4420/files/facebook_like_apk_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7253/4166/files/man_of_medan_trophy_guide_and_roadmap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4560/0931/files/kewopujo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8534/6998/files/weider_8530_exercise_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8622/4791/files/30_inch_towel_bar_set.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/0032/6038/files/stellaluna_activities_first_grade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/1596/8172/files/java_concurrency_framework.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/8742/8257/files/49838054741.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd66db60-5a2a-4b91-aec8-638da9a4a8c9/kolikeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f80c74db-527d-400a-b76f-7181e081471a/xevenodezajalumofepuzajif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19671fa3-8e43-4083-960c-d0550119c20a/bayesian_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a71f9cc2-f938-4d71-9501-5b9e7fe137f0/16531622162.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_off0000751f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x751F 5036 bytes
SHA-256: a6b82cd629f5cecf50a5bed9b2512e0ee2ffdf44bf62aea16476e03ccbd39e19
font_01_sfnt_off0000866f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x866F 10920 bytes
SHA-256: c71fdb62b305f9ac608fe7c94e4a925fb72c6425549a97f372beddf82061d49f

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