Malicious PDF — malware analysis report

Static analysis result for SHA-256 076b68d2490002ea…

MALICIOUS

PDF

47.7 KB Created: 2020-08-19 02:17:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff8a0b5a68a18eaf9fe41b3ba2212632 SHA-1: 7ce52c30f4d942738b694433256e45a0c68a6c56 SHA-256: 076b68d2490002ea616c4cee6b4152b3f290be2df77499144e8857e4d31c05a6
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links directs to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text that appears to be a lure for unique PPT templates, suggesting a phishing or social engineering attempt. No scripts were extracted, but the presence of numerous external links and a malicious redirector indicates an attempt to lead the user to 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.cc/pify?keyword=template+ppt+yang+unik
    • http://visope.colosseumkennels.com/uploads/1/3/1/4/131408791/7253371.pdf
    • http://files.silverliningdesigns.co/uploads/1/3/0/7/130775366/lamogu.pdf
    • http://files.bobsdinerlouisville.com/uploads/1/3/1/4/131437937/7761627.pdf
    • http://files.smsdband.com/uploads/1/3/1/0/131070186/7690db07bb3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8806/0320/files/kanal_5_tv_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40035930655.pdf
    • https://cdn.shopify.com/s/files/1/0427/5470/3526/files/sujizuzuseb.pdf
    • https://cdn.shopify.com/s/files/1/0435/2311/3119/files/git_http_proxy.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63537272249.pdf
    • https://cdn.shopify.com/s/files/1/0448/6122/7169/files/cakewalk_pro_audio_9_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/7193/0529/files/larousse_french_english_dictionary_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/5546/4104/files/contract_engineering_jobs.pdf
    • https://cdn.shopify.com/s/files/1/0430/5505/5002/files/37880039772.pdf
    • https://cdn.shopify.com/s/files/1/0448/4258/2176/files/alto_shaam_1200_up_sr.pdf
    • https://cdn.shopify.com/s/files/1/0431/9975/8497/files/83242338264.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_off00007fbc.bin
55b0b6b8c1b160176fe6a4ff80a2f7ca20b6ef7f261108c11f2da6a25f2cc436		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FBC 4980 bytes
font_01_sfnt_off000090a9.bin
803bbaf000fb1b7c1a70fabd9d020ddfe427b44bb471eea86b807591dd4e8619		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90A9 9896 bytes

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