Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e71f8d18aa12dd7…

MALICIOUS

PDF

42.5 KB Created: 2020-10-29 18:51:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 527493a9605773ee7140833948362078 SHA-1: d5ddd3015ac8f9067bef6ee6373b8902d55a806c SHA-256: 7e71f8d18aa12dd7770676550dace92fc07db61ccd56f018b33d0c17ef343a04
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious domain, disguised with keywords like 'xbmc apk download' to entice clicks. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm suggests SEO manipulation for traffic generation. No scripts were extracted, but the primary malicious function appears to be directing users to a harmful URL.

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.com/123?keyword=xbmc+apk+download
    • https://jukovuwivoxufab.weebly.com/uploads/1/3/3/9/133997180/fisepip.pdf
    • https://mugekezozo.weebly.com/uploads/1/3/1/6/131636766/vamuru.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0499/3581/0714/files/rajolo.pdf
    • https://s3.amazonaws.com/zetare/48856058286.pdf
    • https://cdn.shopify.com/s/files/1/0268/8303/1237/files/worijavifaguxitu.pdf
    • https://cdn.shopify.com/s/files/1/0486/3302/0584/files/focus_group_interviews_in_qualitative_research.pdf
    • https://cdn.shopify.com/s/files/1/0500/4951/5684/files/guvomubafavurugikirogo.pdf
    • https://cdn.shopify.com/s/files/1/0497/7649/2733/files/minecraft_wallpaper_4k_for_mobile.pdf
    • https://cdn.shopify.com/s/files/1/0485/2609/8594/files/39092396102.pdf
    • https://s3.amazonaws.com/zerejibixupav/julius_caesar_multiple_choice_test_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/3892/3169/files/descargar_csi_las_vegas_temporada_1_latino_mega.pdf
    • https://s3.amazonaws.com/lijopavexanuse/xezowijosowenajikunopogu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6499/1649/files/roku_private_listening_stutter.pdf
    • https://s3.amazonaws.com/bewibiwat/95324199752.pdf
    • https://s3.amazonaws.com/mijedusovineti/government_budgeting_process.pdf
    • https://s3.amazonaws.com/kizugokofo/pikenadapapizubazo.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_off00006877.bin
433d281a87fa16f2e9320b9e30b7d16def68b584740faebab07a561934a4d5b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6877 5216 bytes
font_01_sfnt_off00007a30.bin
dc65fa8eb43b029a9b0ffb44fe865606496e6a84e1d26ea3e0ab8c7aa8c3196c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A30 10248 bytes