Malicious PDF — malware analysis report

Static analysis result for SHA-256 777eea7f6051b0df…

MALICIOUS

PDF

47.7 KB Created: 2020-08-17 18:40:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c147321b025cf2e21e9365def90a568f SHA-1: 0fd5b3ee2333ef75f2bd4c1b7eada1812418db43 SHA-256: 777eea7f6051b0df58bac733c0db322e37509d49834940ed5076360228afd3e1
154 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous external PDF links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/pify?keyword=environmental+impact+report, which is flagged as malicious. This suggests the document is designed to redirect users to malicious infrastructure, likely for phishing or malware distribution.

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.ru/pify?keyword=environmental+impact+report
    • http://files.jendurst.com/uploads/1/3/1/4/131437515/finubemosi.pdf
    • http://files.krazy4woo.com/uploads/1/3/0/7/130739202/jozupuber-jamaru-puziluzomima.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/5080/2081/files/ascii_values_in_c.pdf
    • https://cdn.shopify.com/s/files/1/0431/3340/3285/files/lds._org_leader_and_clerk_resources.pdf
    • https://cdn.shopify.com/s/files/1/0434/8562/6520/files/7331455826.pdf
    • https://cdn.shopify.com/s/files/1/0429/2981/5711/files/14145919583.pdf
    • https://cdn.shopify.com/s/files/1/0431/5702/9019/files/affidavit_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/1732/9064/files/what_is_data_science_in_simple_words.pdf
    • https://cdn.shopify.com/s/files/1/0434/7029/1096/files/70852743499.pdf
    • https://cdn.shopify.com/s/files/1/0429/1241/5897/files/86632618402.pdf
    • https://cdn.shopify.com/s/files/1/0431/2226/2178/files/sivunobabozak.pdf
    • https://cdn.shopify.com/s/files/1/0431/7829/5450/files/bipagilojatufumak.pdf
    • https://cdn.shopify.com/s/files/1/0433/9446/5948/files/convert_to_dwg_in_autocad_lt_2020.pdf
    • https://cdn.shopify.com/s/files/1/0440/6460/4310/files/kididisefomaxesajixiwaku.pdf
    • https://cdn.shopify.com/s/files/1/0431/3432/0794/files/1403422565.pdf
    • https://cdn.shopify.com/s/files/1/0432/4930/3720/files/2003_honda_element_repair_manual.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_off00007ee2.bin
0912b988e92c998710e4b9c7f75b42ecb5db501c7693a11eca2d0af437ff3af8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE2 4916 bytes
font_01_sfnt_off00008f81.bin
24188feb614f486f54a6e6d5c1763f1dd86c419965ca81824b5bb5a6de9bf7ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F81 10032 bytes

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