Malicious PDF — malware analysis report

Static analysis result for SHA-256 e57b7fb5c008baca…

MALICIOUS

PDF

62.2 KB Created: 2020-11-23 19:25:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5073df675cbb00c3b5393c5468d4da34 SHA-1: 7925bf6ecee9fa454a9b09b8627997c9eb0dd759 SHA-256: e57b7fb5c008baca80992ad7850871e2831ff6190ae475c0ffc3b4c2fdb526c9
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a PDF link farm, indicating it hosts numerous external links. One prominent URL, 'https://traffine.ru/strik?utm_term=new+louis+vuitton+bag+2016', is suspicious and likely leads to malicious content. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=new+louis+vuitton+bag+2016
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/tuvesowovoviju.pdf
    • https://fagozeku.weebly.com/uploads/1/3/4/5/134506452/dileso-vakiji-nijejatepibet-togir.pdf
    • https://jolibudowuw.weebly.com/uploads/1/3/4/5/134596284/zedire-vuvadidibudogo-babeketigefen-vesozar.pdf
    • https://dodivimibo.weebly.com/uploads/1/3/4/3/134305777/4576463.pdf
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/nuxureb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/watajive/apk_free_fire_game_download.pdf
    • https://s3.amazonaws.com/xafaxotaful/army_body_composition_program_study_guide.pdf
    • https://s3.amazonaws.com/ropuba/fefokolulidobozekazod.pdf
    • https://s3.amazonaws.com/muguroviv/xadeka.pdf
    • https://uploads.strikinglycdn.com/files/7975d2fc-3cc6-4dbe-99db-ab4e1dabdbb9/weather_in_the_mediterranean_in_march.pdf
    • https://s3.amazonaws.com/pazifetanegapu/41729561162.pdf
    • https://uploads.strikinglycdn.com/files/63a7d3d6-8092-462a-86a1-04e0c5b0cf5e/13301412577.pdf
    • https://uploads.strikinglycdn.com/files/7b3a78fa-26fd-47ac-a12d-b8bbfedde5fa/11180264842.pdf
    • https://s3.amazonaws.com/kiwopusafize/finape.pdf
    • https://s3.amazonaws.com/welanisowari/pukufagep.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_off0000b586.bin
f9ade8fd5aa07ecece8f51c75d7c831fd775af551d0162159d2b69f03c5168d1
pdf-font-stream PDF embedded font (sfnt) at offset 0xB586 5496 bytes
font_01_sfnt_off0000c876.bin
233640dc6aedef8d4042c8b6baa96888b7a025dfc8749fffd0da227a1cbdfba4
pdf-font-stream PDF embedded font (sfnt) at offset 0xC876 10072 bytes