Malicious PDF — malware analysis report

Static analysis result for SHA-256 6749f9f2e8c391c8…

MALICIOUS

PDF

76.5 KB Created: 2020-11-28 01:18:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08e9be130b27bbd2a2f47b2acdcfe760 SHA-1: 6cc0a7ede38249630f14dded7553da266909f27b SHA-256: 6749f9f2e8c391c8cfc232ed387a813bee02b73e816a1c295d7fc40ef6444fd0
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with a critical heuristic identifying it as a PDF link farm. One of the primary external links points to 'traffking.ru', suggesting a malicious intent to redirect users. While no scripts were directly extracted, the PDF structure and the presence of numerous external links indicate a likely attempt to distribute malicious content or phish users. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffking.ru/aws?utm_term=react+formcontrol+checkbox
    • https://cdn-cms.f-static.net/uploads/4505839/normal_5fad46a801091.pdf
    • https://vivifaxokuz.weebly.com/uploads/1/3/4/5/134511129/836151.pdf
    • https://cdn-cms.f-static.net/uploads/4421969/normal_5f9736820be04.pdf
    • https://cdn-cms.f-static.net/uploads/4416493/normal_5f95ca07f39f0.pdf
    • https://givexikiduxa.weebly.com/uploads/1/3/1/3/131398224/8891976.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • https://s3.amazonaws.com/zidenigad/onn_hd_antenna_manual.pdf
    • https://uploads.strikinglycdn.com/files/7ca164c5-52f5-4c5b-946a-dbb32d8ae805/lokodadap.pdf
    • https://s3.amazonaws.com/fujadabez/92266911871.pdf
    • https://s3.amazonaws.com/vobuturinivi/43693529482.pdf
    • https://s3.amazonaws.com/difigomisosak/wetoxor.pdf
    • https://uploads.strikinglycdn.com/files/0bf13f22-6e1e-44d5-834c-2ca10bc20987/gevuvemiwuwekexewato.pdf
    • https://s3.amazonaws.com/fogibi/kim_kardashian_hollywood_reality_riddle_answer.pdf
    • https://s3.amazonaws.com/wusigipufuvowix/bombay_velvet_full_movie_mkv.pdf
    • https://s3.amazonaws.com/zepifudoxapo/american_bulldog_johnson_type_for_sale_in_georgia.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
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c176.bin
10a07fc969e6c8cf41398fcfefa625e426b29a45b33f3716d0886db1405c0d2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC176 2900 bytes
font_01_sfnt_off0000cbb9.bin
d9ae69ba64fe3a7f46e7d68115a4eeebd9f8e88cad2723dbfc3294ef721b310b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB9 5224 bytes
font_02_sfnt_off0000dd53.bin
2bf992f389bbc184efb700ab173f0c51bf6279e34a77a7936d20649b8055940b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD53 10904 bytes
font_03_sfnt_off0000fc1a.bin
c4a41aa20aa0a9d5af6f1548b6cef4112b19dad24ce6f6ca91b541272889c144		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC1A 11184 bytes

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