Malicious PDF — malware analysis report

Static analysis result for SHA-256 14c4c5a85338e80c…

MALICIOUS

PDF

40.7 KB Created: 2020-08-30 05:55:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c62bc8de4a5e5978a65d27a981f7ebd SHA-1: e1ff23f9f4ce59ce95c989fd5cc86e857c1a2472 SHA-256: 14c4c5a85338e80c00c4a8217ad95f538878789999fc22ec723240698f1e0a59
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to known malicious infrastructure, disguised with SEO-like keywords. The document body, though heavily obfuscated, contains the same URL and appears to be a lure for users searching for specific content. The ML classifier also strongly indicated maliciousness.

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/wix?keyword=law+of+success+napoleon+hill+in+hindi
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/8685/5840/files/pdf_to_word_conversion_free_download_for_ubuntu_14._04.pdf
    • https://cdn.shopify.com/s/files/1/0437/6854/5442/files/96987770804.pdf
    • https://cdn.shopify.com/s/files/1/0435/0096/1947/files/responsive_food_website_templates_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/4355/2416/files/zenanizo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5213/7625/files/15427724357.pdf
    • https://cdn.shopify.com/s/files/1/0435/1731/3178/files/north_america_political_map.pdf
    • https://static.usrfiles.com/ugd/b3bc21_14f4b53645e44a1d802646beef383fda.pdf
    • https://static.usrfiles.com/ugd/191a6d_17ca03616424465d87a64a6b6bd062ca.pdf
    • https://cdn.shopify.com/s/files/1/0459/9529/4887/files/85420621105.pdf
    • https://cdn.shopify.com/s/files/1/0437/2099/9064/files/27043075666.pdf
    • https://cdn.shopify.com/s/files/1/0450/5973/5704/files/the_fifth_wave_2.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a2d.bin
622bb9c022009449577a61efe285c469e32ad0b9ddd1e2584c8a68b51d909097
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A2D 5180 bytes
font_01_sfnt_off00005bda.bin
7c7a4e19fd19a606bb7b75612a6e5cf15e280a4afe8c54649aafb198d12787e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BDA 10664 bytes
font_02_sfnt_off00007f14.bin
e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F14 16164 bytes