Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c7685790256dc08…

MALICIOUS

PDF

32.0 KB Created: 2020-08-19 16:03:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad43240cf9e15810862700e33aa4bca0 SHA-1: e316847336dcb48e819cda821640fca18624334d SHA-256: 5c7685790256dc082958ae053c4dd7462b6d5c37748eaa07965ea96c48158357
162 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector and others pointing to Shopify-hosted PDFs. The ML classifier strongly flagged this PDF as malicious. The presence of a download button lure suggests an attempt to trick the user into further interaction. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious campaign, likely involving social engineering to drive traffic to malicious or SEO-manipulated content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=banjo+trance+mix+dj+mandar+song
    • http://files.clucasart.com/uploads/1/3/0/9/130969655/susadugojaposegax.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/6455/6710/files/bootstrap_dropdown_menu_not_working_on_android.pdf
    • https://cdn.shopify.com/s/files/1/0431/4369/2445/files/xixun.pdf
    • https://cdn.shopify.com/s/files/1/0438/1127/4914/files/napavufomagorisin.pdf
    • https://cdn.shopify.com/s/files/1/0432/0939/2285/files/tijigujavoworaj.pdf
    • https://cdn.shopify.com/s/files/1/0440/9848/6424/files/jobanosidelupigofajo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5824/9376/files/46052714415.pdf
    • https://cdn.shopify.com/s/files/1/0433/4151/2855/files/gubotadagipasoda.pdf
    • https://cdn.shopify.com/s/files/1/0433/0140/4830/files/16465261465.pdf
    • https://cdn.shopify.com/s/files/1/0429/4233/3087/files/69411369037.pdf
    • https://cdn.shopify.com/s/files/1/0428/9026/4742/files/maternal_and_child_health_care_services.pdf
    • https://cdn.shopify.com/s/files/1/0444/6945/2967/files/inequality_word_problems_algebra_1.pdf
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/losazapivelodiwosaz.pdf
    • https://cdn.shopify.com/s/files/1/0429/7129/9999/files/codex_alimentarius_standards_and_guidelines.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_off0000416b.bin
fcd4feff8c221adfd88555dd1369b2526c7e8afbdadb3a0c5e8d51e7897e1823		 pdf-font-stream PDF embedded font (sfnt) at offset 0x416B 5420 bytes
font_01_sfnt_off000053c8.bin
28699961053f759b6696f1101241e74235e93815e4b18b9998b309be3309fadd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53C8 9240 bytes

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