Malicious PDF — malware analysis report

Static analysis result for SHA-256 00ec4a577d7451f7…

MALICIOUS

PDF

48.8 KB Created: 2020-08-30 09:13:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 817dde9065a5bc5e6fe54370e3725e4d SHA-1: d09e3011e5e9a296b8ebfaec0932819b40c0a271 SHA-256: 00ec4a577d7451f7cd70715d472db3c7ce99288417cc6c860a7d1fa6bc7a662c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=zoom+google+chrome'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which are benign Shopify links, likely used to obscure the malicious one. The ML classifier also strongly flagged this PDF as malicious. The primary malicious IOC is the redirector URL.

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/wix?keyword=zoom+google+chrome
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0446/3758/5571/files/guitar_string_action_gauge_template.pdf
    • https://cdn.shopify.com/s/files/1/0439/8107/8686/files/breast_cancer_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/6090/1526/files/80754910035.pdf
    • https://cdn.shopify.com/s/files/1/0433/4767/3253/files/7225220567.pdf
    • https://cdn.shopify.com/s/files/1/0427/4972/2790/files/32041749721.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/wordly_wise_3000_book_6_lesson_11_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0460/2472/0543/files/53802548511.pdf
    • https://cdn.shopify.com/s/files/1/0435/9041/8589/files/b_arch_thesis_projects.pdf
    • https://cdn.shopify.com/s/files/1/0433/5845/3918/files/fujonuxurusej.pdf
    • https://cdn.shopify.com/s/files/1/0440/3753/7942/files/carte_monde_vierge.pdf
    • https://cdn.shopify.com/s/files/1/0433/7228/2008/files/all_keter_scps.pdf
    • https://static.usrfiles.com/ugd/8d57bd_2f722dbec0924698a8e7acd7c0719e1a.pdf
    • https://static.usrfiles.com/ugd/07ef24_3bf79adfeb6440faab294d227d29179e.pdf
    • https://static.usrfiles.com/ugd/b7306e_962e5ce26c8f4231a7335e243e4a6f28.pdf
    • https://static.usrfiles.com/ugd/b8c837_f2b9532331dc4e2fb6faa92178c372c5.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_off00006955.bin
96071ab3f8bdfa2d19b55227b82cc20f06c4106f4a515e619932fd83634ae1f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6955 4784 bytes
font_01_sfnt_off0000797f.bin
012a0de790d9268775d9902cb0c4f56fe319382e039120b3a8c0f620c1eac724		 pdf-font-stream PDF embedded font (sfnt) at offset 0x797F 11268 bytes
font_02_sfnt_off0000a00e.bin
0e7aa3e103dae99b9fd7fb9f3da70d089fe1641e860dd4be3183ee5a7a7db4fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA00E 16500 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.