Malicious PDF — malware analysis report

Static analysis result for SHA-256 c606e4080cd21af0…

MALICIOUS

PDF

50.8 KB Created: 2020-09-05 07:36:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d309bb0a73745d58c4f865f321f2c381 SHA-1: e9ae6a1fd670878338a8da8a4fe2aa56f988e00d SHA-256: c606e4080cd21af04ca3e5c0ecca0778aa419667d12c6de070b67cec8540a47f
152 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 'ttraff.club'. Additionally, it exhibits a PDF link farm heuristic, with many links pointing to Shopify domains, suggesting an attempt to obscure the malicious destination. The document body, though heavily garbled, contains the same URL as the malicious redirector, reinforcing the lure. No scripts were extracted from this sample.

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.club/wix?keyword=love+is+deep+chinese+drama+song
    • https://cdn.shopify.com/s/files/1/0463/6255/8619/files/iim_a_case_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9115/files/2942364739.pdf
    • https://cdn.shopify.com/s/files/1/0435/8520/8483/files/ios236_installer_v8.pdf
    • https://cdn.shopify.com/s/files/1/0432/7004/5864/files/18108191782.pdf
    • https://cdn.shopify.com/s/files/1/0437/8905/8206/files/namerotuvarajexomupeba.pdf
    • https://cdn.shopify.com/s/files/1/0438/4695/9261/files/kidz_bop_anaconda.pdf
    • https://cdn.shopify.com/s/files/1/0433/6982/4414/files/supply_chain_management_strategy_planning_and_operation_solution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pufabupenidobuxix.pdf
    • https://cdn.shopify.com/s/files/1/0434/1425/7820/files/define_psychology.pdf
    • https://cdn.shopify.com/s/files/1/0452/3288/1824/files/lettera_di_dimissioni_in_inglese_template.pdf
    • https://static.usrfiles.com/ugd/bae363_cf1bdc8e5716454292c0ebff021e301e.pdf
    • https://static.usrfiles.com/ugd/b8c837_7649132ef5904122b1299c1e52f472a3.pdf
    • https://static.usrfiles.com/ugd/e78b77_f786f2cc0c4e4b999354abdd4ac2f471.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000054c3.bin
eacf0fce9a124a70ad18e0733f5386546df6c9f19f7eb77aa8c5e028e980f5ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x54C3 16636 bytes
font_01_sfnt_off00008970.bin
4cc76156a45ea6af5c31f93ed1e476181ed436e3905ca49888e30717e79ff634
pdf-font-stream PDF embedded font (sfnt) at offset 0x8970 5456 bytes
font_02_sfnt_off00009bdd.bin
687d6fd53888f3083365d79073ef7b05a37a3969d0eb436bf076a0ac93022c9c
pdf-font-stream PDF embedded font (sfnt) at offset 0x9BDD 10128 bytes