Malicious PDF — malware analysis report

Static analysis result for SHA-256 84fbe812b66e5a5a…

MALICIOUS

PDF

48.4 KB Created: 2020-11-09 10:17:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb70758f61a05389e4d4a29d3990286b SHA-1: 5b81e52b14548aeaaffff14436e201fe2dc465d2 SHA-256: 84fbe812b66e5a5ab251df51694e3f6360bfcfd6b12d6576d4e4cc967d0a5d64
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of these links, 'https://traffine.ru/123?keyword=commerce+science+and+transportation+bills', appears to be a primary malicious destination. The presence of numerous links suggests an attempt to manipulate search engine results or redirect users to malicious content, likely for SEO spam or phishing purposes. No scripts were extracted, but the structure and link farm indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://traffine.ru/123?keyword=commerce+science+and+transportation+bills
    • https://gebedevalofibut.weebly.com/uploads/1/3/4/3/134379687/8703230.pdf
    • https://bipinutafo.weebly.com/uploads/1/3/4/3/134358532/258022.pdf
    • https://mesipaku.weebly.com/uploads/1/3/1/3/131383407/f32c50c28344981.pdf
    • https://xoretesani.weebly.com/uploads/1/3/4/3/134315313/3172792.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://gizibutabob.files.wordpress.com/2020/11/71533201839.pdf
    • https://xowokovemu.files.wordpress.com/2020/11/pagan_sex_rituals_pictures.pdf
    • https://lilenojilel.files.wordpress.com/2020/11/flex_design_cdr_file_free.pdf
    • https://titolanije.files.wordpress.com/2020/11/water_supply_and_sanitary_engineering_rangwala.pdf
    • https://tevarew.files.wordpress.com/2020/11/88608638079.pdf
    • https://lofunaxuroj.files.wordpress.com/2020/11/julem.pdf
    • https://uploads.strikinglycdn.com/files/8c63c813-711b-4cc6-bb26-568e28484655/35319515335.pdf
    • https://s3.amazonaws.com/zalomi/laberonomotateb.pdf
    • https://uploads.strikinglycdn.com/files/7837519b-64dd-4c2b-a113-91d250405fe5/xadumop.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_off00007c5d.bin
7b2ebaaaf7a0e8f6a5fb1f4a4d7d4e30ee1999abc0ea14c8228d32b94627bd38
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C5D 5264 bytes
font_01_sfnt_off00008e1e.bin
8773fcf2c7086088226fe0ea9c37eabdeee9386f2da30bf7279edc37e1846fb7
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E1E 11616 bytes