Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ada6d882ce36838…

MALICIOUS

PDF

44.8 KB Created: 2020-10-09 07:23:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 885742239f24399a21cb20cd8ded51f3 SHA-1: f27b9b3c8a4ac2edabb136d7cf56f407ea457305 SHA-256: 0ada6d882ce3683870ca61e672c60a0e8dd9adb6979b2d5355407a90c04ffc1c
184 Risk Score

Malware Insights

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

The PDF contains embedded links that lead to a known malicious redirector, suggesting an attempt to direct users to malicious content or phishing sites. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector found by heuristics. The presence of numerous links to external PDFs, some on disposable hosting, indicates a link farm or SEO poisoning tactic to improve search engine ranking for malicious content.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/pify?keyword=justice+central+channel+comcast In PDF document text
    • http://murov.esspeech.com/uploads/1/3/1/1/131163953/xarezuwadolo.pdfIn PDF document text
    • http://files.mjeromebell.com/uploads/1/3/2/7/132710603/9208834.pdfIn PDF document text
    • http://files.teachingenrichmentkids.com/uploads/1/3/2/6/132681476/ac89d2f9.pdfIn PDF document text
    • http://sivovepix.kerengans.com/uploads/1/3/1/4/131453465/494250dd.pdfIn PDF document text
    • http://liwusiwo.thefastshopp.com/uploads/1/3/1/4/131483400/4b47736683bf.pdfIn PDF document text
    • http://jikasogo.dracutoymh.org/uploads/1/3/1/4/131406895/c86345d5981471.pdfIn PDF document text
    • http://files.whitetailtents.com/uploads/1/3/1/6/131637016/sejesurilalif-danedokefab-tonevapafitato-gabenaf.pdfIn PDF document text
    • http://files.kingsporthorses.com/uploads/1/3/1/6/131607374/014d297abc02d.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/8ec26a45-7ab5-41e4-a62b-ae6b6a1d279e/bedateku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52e34248-6a3c-4ec1-963f-733aed05edc7/xemipivo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3842389b-173a-4502-a8de-e3386adf3022/benejegapas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83b5a3f2-d861-4e2f-90b6-50737f87ae86/novazebula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b9f4729-cca0-4263-bac0-95aa025877eb/25763740412.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_off00007079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7079 5028 bytes
SHA-256: 71a4448498d6a0009bc43f6d3b8ddaa10c5cd33464e5b6b44ed70e311b1ff9c4
font_01_sfnt_off0000815e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x815E 10832 bytes
SHA-256: 1c8d107580f6d36c4c6b758aafeacfad63956529be6d3023ceeeacef5a65b2d0

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