Malicious PDF — malware analysis report

Static analysis result for SHA-256 655b24eda80cf016…

MALICIOUS

PDF

44.5 KB Created: 2020-08-18 16:32:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 36a67516fe9d89fda8fa0baa2b6da48e SHA-1: 4fa1c1032871c73abb5d33098ae44dc8a53a7bab SHA-256: 655b24eda80cf01619780f7cc1e20af2266b3a46263c19ab6324b85aadff90c7
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs that lead to a redirector, which is flagged as malicious. The document body, though heavily obfuscated, contains text suggesting it is a "Dragonfable leveling guide" and includes the malicious URL. This indicates a phishing or scam attempt designed to redirect users to harmful 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.cc/pify?keyword=dragonfable+leveling+guide
    • http://dotenobew.fefesdesign.com/uploads/1/3/1/3/131384240/882847.pdf
    • http://files.azeyemds.org/uploads/1/3/0/8/130814169/abb40b2f7b9f393.pdf
    • http://files.msrhondajwilliams.com/uploads/1/3/2/7/132741535/gasixodub.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0077/4307/files/38869921262.pdf
    • https://cdn.shopify.com/s/files/1/0432/4959/8632/files/xanetoxabelovis.pdf
    • https://cdn.shopify.com/s/files/1/0440/4976/0421/files/phi_x174_phage_life_cycle.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/rexevebekatomulijufamuw.pdf
    • https://cdn.shopify.com/s/files/1/0430/2897/1681/files/pojoloduvurifu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3605/7501/files/chaupai_sahib_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0441/2515/9576/files/lavazavad.pdf
    • https://cdn.shopify.com/s/files/1/0430/8844/5589/files/88379040262.pdf
    • https://cdn.shopify.com/s/files/1/0429/8843/7655/files/us_states_abbreviations_list.pdf
    • https://cdn.shopify.com/s/files/1/0428/9144/4390/files/surface_area_of_rectangular_prism_word_problems_worksheet.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_off00006fd3.bin
99799f0d0a683cc09e1cb201d37332398371077eef842c2baaf8240e800f8dc2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FD3 5096 bytes
font_01_sfnt_off0000813d.bin
8bfb804f6c73b89e259328421a89405d7ec166a2bb555ecdb7c79595ebcf7668
pdf-font-stream PDF embedded font (sfnt) at offset 0x813D 10588 bytes