Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb462aac210a5f7a…

MALICIOUS

PDF

64.2 KB Created: 2020-10-30 12:12:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b5115e1e18fc11773237c8818151ea5 SHA-1: 79f2de756eeba80c141a65fabb38292fcd691098 SHA-256: bb462aac210a5f7a280d88e255234d91a0029d4b6797a2580fe4162e0be68e4d
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to other PDFs, suggesting a link farm or SEO manipulation tactic. It also contains a direct link to a known malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, likely to lead users to harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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/strik?keyword=the+triple+threat+of+fraud+involves%253A
    • https://nevitasez.weebly.com/uploads/1/3/4/3/134305442/5213839.pdf
    • https://remewizefo.weebly.com/uploads/1/3/1/8/131856163/latapamefaw_zedagu_soxeti_jufex.pdf
    • https://moguvikob.weebly.com/uploads/1/3/0/8/130874292/zutokakowepubuno.pdf
    • https://cdn-cms.f-static.net/uploads/4388620/normal_5f8deb742e6ba.pdf
    • https://lubukapilibuvi.weebly.com/uploads/1/3/4/0/134095968/suvufamoga.pdf
    • https://cdn-cms.f-static.net/uploads/4386337/normal_5f8d7d223babd.pdf
    • https://sibakixode.weebly.com/uploads/1/3/2/8/132814768/wakenafo_vurebusej_metedorakeru_runuseteni.pdf
    • https://cdn-cms.f-static.net/uploads/4373782/normal_5f8e760aabcf6.pdf
    • https://cdn-cms.f-static.net/uploads/4408871/normal_5f9991223b50f.pdf
    • https://cdn-cms.f-static.net/uploads/4407996/normal_5f94ccf353049.pdf
    • https://cdn-cms.f-static.net/uploads/4369640/normal_5f87c49f16745.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/dcddc16d-84ec-4653-8a64-ba2415ad36ab/45474983196.pdf
    • https://uploads.strikinglycdn.com/files/65c9fbb8-c625-45c5-b11b-e0ffd6f0cc26/toy_story_3_wii_iso_google_drive.pdf
    • https://uploads.strikinglycdn.com/files/6f52be6b-9bc3-4b05-8556-cf7557b94bea/moguzirebanidedo.pdf
    • https://s3.amazonaws.com/pivetuzadujo/rofidukozubi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be17.bin
b479eb184d95140d810adbc055d5a02866da89dbc2921be304366aa03b91ff5a
pdf-font-stream PDF embedded font (sfnt) at offset 0xBE17 5188 bytes
font_01_sfnt_off0000cfc1.bin
6bd11d48dc462bbeb8f4d5fb4c2305c5e78c3763b18374b591aa55bf11cfd3b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xCFC1 10484 bytes