Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dd1e8eaa1bdfb14…

MALICIOUS

PDF

69.9 KB Created: 2020-12-18 13:52:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b56f835b5bc8da4e1d4931d551dda7df SHA-1: 4adaf8161a976016c2f8e6d09a0269c5ffd27a68 SHA-256: 6dd1e8eaa1bdfb14c9ed64d7bbf7dd054226f6d5235c002ac9f6e9314b4da904
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by multiple heuristics and a machine learning classifier, specifically flagging it as a redirector link and part of a link farm. The embedded URLs, particularly https://cctraff.ru/123?utm_term=the+secret+life+of+fat+pdf, are indicative of phishing or malicious redirection attempts. The document body appears to be malformed or obfuscated, providing no clear user-facing content but containing metadata related to its generation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://cctraff.ru/123?utm_term=the+secret+life+of+fat+pdf In PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/8af89563c3c02b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407991/normal_5fcf83c911ec3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368745/normal_5f923a481aa63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446400/normal_5fa43e3edf7ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450340/normal_5fc0319c8ec58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407331/normal_5fa784afe7c0b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d354803f-4248-4b7b-8b64-5b280811fb16/pibiwemud.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/las_estaciones_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/55428344298.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a53da241-d0dc-4215-93bf-599b2572f0bf/funny_horse_videos_for_toddlers.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD481 5192 bytes
SHA-256: 39190b2887ac1a3f70330b75ab78786c7d76073c0eeeacfe640009aa285acd87
font_01_sfnt_off0000e622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE622 10724 bytes
SHA-256: 20bfe61a230d30092e7f7359c27be1d0a0c4df8616ccd8c70bf523cd5b66726d

Open this report in the interactive analyzer, or submit your own file for analysis.