Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f71c5d8d1534ea1…

MALICIOUS

PDF

37.4 KB Created: 2020-09-17 08:49:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3cf7f423351c2e1b1994e7f4037ce3a9 SHA-1: 7cdb4c8c779f8dd3f83534f71d3588c3d56f7be3 SHA-256: 6f71c5d8d1534ea10f275e5536fb7373261aa30452e252cfe0756ea6b51ebdca
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, disguised with a lure related to streaming a movie. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms this behavior. The ML classifier also strongly flagged this PDF as malicious. The embedded URLs suggest a link farm designed to distribute further malicious content.

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://ttraff.club/wix?keyword=les+vacances+du+petit+nicolas+streaming+film+complet+en+fran%25C3%25A7ais+gratuit
    • http://mixom.steamartroom.com/uploads/1/3/0/7/130775934/wafexetiresoti_xixesekurapugak_xiwobogunodop.pdf
    • http://fojixejel.wpbluebirdfestival.org/uploads/1/3/1/3/131383332/nuroxerepojufifexu.pdf
    • http://files.bordermx5s.com/uploads/1/3/1/4/131408131/2c97802a8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0462/4144/8090/files/46079853977.pdf
    • https://cdn.shopify.com/s/files/1/0433/9141/8526/files/20380472930.pdf
    • https://cdn.shopify.com/s/files/1/0430/6485/2634/files/word_count_tool_online.pdf
    • https://5d5b0ea9-fea7-460f-8bb6-85815a963c63.filesusr.com/ugd/3d0627_9f5f46b529c5499bb6ae9919e3a6fb8a.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0429/0124/2022/files/akhiyon_ko_rehne_de_video_free.pdf
    • https://cdn.shopify.com/s/files/1/0440/8272/5029/files/koputabisonuxalibivi.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_off00004de5.bin
3e0efbb7cb036e0163345a2ebd78c99ed10eb6fc3d917ecf3fbe463f7c38ff56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DE5 5660 bytes
font_01_sfnt_off000060d4.bin
7cf9c63286fad75b1fc9fbc367d561588895e780021e6a30eaf6b6dc25857e27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60D4 11512 bytes

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