Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bc4be448db5a590…

MALICIOUS

PDF

96.4 KB Created: 2020-11-04 14:29:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c94925e670f52c99c849ba562e8ca550 SHA-1: 9c3b7c86f5f52de4fd6e4374ccc10474b2bc060d SHA-256: 7bc4be448db5a5907a17fafb4cefb5081768825567b1f5fc23d7fc13da92a12c
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://gettraff.ru/123?keyword=honeywell+vista+15p+user+guide'. Additionally, a high-severity heuristic indicates a lure for MFA or one-time code harvesting, suggesting a credential phishing attempt. The document body also contains this malicious URL alongside numerous other PDF links, many of which are benign, but the primary link is flagged as malicious.

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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://gettraff.ru/123?keyword=honeywell+vista+15p+user+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387921/normal_5f9c4d34b04bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393189/normal_5f8f88e984af6.pdfIn PDF document text
    • https://kukezuleji.weebly.com/uploads/1/3/4/3/134361302/6966330.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368503/normal_5f8a03f748f14.pdfIn PDF document text
    • https://kurikezexiwu.weebly.com/uploads/1/3/0/7/130775092/xorasivutarasu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412768/normal_5f94b1d2c1108.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405443/normal_5f991333dfea8.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/vukusa/post_behaviouralism_in_political_science_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c9b5c47-64c3-4b10-9823-bf4f19b120dd/zasedupaxuwetaxezisupix.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/powokubogugev.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/ahmedabad_district_map.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/aparato_reproductor_femenino_funciones.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d04a4666-6660-4e1c-9a8a-041d932b24c2/89718784557.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/bixasozexagidewix.pdfIn PDF document text
    • https://s3.amazonaws.com/vezosoluvezoj/fish_tales_book.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012559.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12559 5520 bytes
SHA-256: 90eb62637686b9378e71d7f0e06af58f73e8d91395fe1799d522f8e1aaa0f8f5
font_01_sfnt_off00013850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13850 11536 bytes
SHA-256: e62dab78d9072056bfb913a6ba3c39798c3b0ef9c1dfc846b92f8f65373df66b
font_02_sfnt_off00015fc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FC9 16112 bytes
SHA-256: 04c641d0aedeaa8c494855f42a2e9ae6fad9e3679126e7dc5c08fccc4b41c292

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