Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bf73cd9b1f4a305…

MALICIOUS

PDF

69.0 KB Created: 2020-09-11 02:52:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5775449206e26d9a01552e95bbab7f1a SHA-1: c65773d8b27419d43372b0bec89b9ecf003073ee SHA-256: 5bf73cd9b1f4a3050d3ef92b918a54058ee395b7579cd5eed83d78612b42f691
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links to external resources, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'bootstrap admin website templates free' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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=bootstrap+admin+website+templates+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/913720_3a02c01d28014a89bb48af5cd57a11bf.pdf
    • https://static.usrfiles.com/ugd/66f3f9_403367333c25415292a9aa9c9d48f977.pdf
    • https://static.usrfiles.com/ugd/b8c837_834f1ea47de1430fbb9741efb9b80c99.pdf
    • https://static.usrfiles.com/ugd/162fe6_f2eb289f8abf45c6ac051d15ca1e0de7.pdf
    • https://static.usrfiles.com/ugd/430cb2_671e6dc7562d4cf090e0a0402d239553.pdf
    • https://static.usrfiles.com/ugd/ab922d_71b166f5bf7748688a23c557899d4224.pdf
    • https://static.usrfiles.com/ugd/90423f_152465436b7c4c578e156e1babf6fdff.pdf
    • https://static.usrfiles.com/ugd/affaa6_8a7dcb65a60f46f6b6c5ff767770a3b7.pdf
    • https://static.usrfiles.com/ugd/a2d007_28e102ec78604499991bf75459c2025f.pdf
    • https://static.usrfiles.com/ugd/12dc78_fe996fb0adf94a66919c3e4c2509e21d.pdf
    • https://static.usrfiles.com/ugd/917232_5a245a9cd939465fa07d250b82f0be96.pdf
    • https://cdn.shopify.com/s/files/1/0478/0553/0279/files/new_cg_song_3gp.pdf
    • https://cdn.shopify.com/s/files/1/0434/2562/8327/files/vitoxabazebag.pdf
    • https://cdn.shopify.com/s/files/1/0459/6642/6279/files/chuyen_dang_anh_sang_word.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_off0000d3a1.bin
1a038d0df68376ed09ccc24f2ac8d22a72b9282fa25aa93b9973f9275d8db89a
pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A1 5468 bytes
font_01_sfnt_off0000e630.bin
fa5a1782e6857df18882cd605382bbf64ce80b83af78d5dab43e39bf82b5abee
pdf-font-stream PDF embedded font (sfnt) at offset 0xE630 9724 bytes