Malicious PDF — malware analysis report

Static analysis result for SHA-256 77f3c156ef9b51dd…

MALICIOUS

PDF

45.4 KB Created: 2020-08-17 17:31:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c2e64fcb298ecade771a5afc8f7e619 SHA-1: 3dfe0f00a08fa69cd0e2764e85e9cf6fa84d9889 SHA-256: 77f3c156ef9b51dd5661f8aaa738143402de90f3eddf9839ef3be9b990feff4f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with at least one identified as a redirector to a known malicious URL. The document body also contains the malicious URL, suggesting an attempt to direct users to potentially harmful content. The ML classifier strongly indicated maliciousness, supporting the assessment of a phishing or redirection attack.

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=orbit+er+linux
    • http://files.dioperez.com/uploads/1/3/1/4/131482952/zomevumujip_mofarife.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5024/6054/files/38447361567.pdf
    • https://cdn.shopify.com/s/files/1/0430/8228/5216/files/convertir_de_a_word_small.pdf
    • https://cdn.shopify.com/s/files/1/0431/5840/5274/files/ponufuzevawosewixite.pdf
    • https://cdn.shopify.com/s/files/1/0432/8180/9558/files/fobufavirutidop.pdf
    • https://cdn.shopify.com/s/files/1/0432/1656/8487/files/lupajuduki.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50878135704.pdf
    • https://cdn.shopify.com/s/files/1/0434/5099/0753/files/68126819900.pdf
    • https://cdn.shopify.com/s/files/1/0439/0364/7912/files/global_food_and_beverage_industry.pdf
    • https://cdn.shopify.com/s/files/1/0432/1663/4016/files/parasuvuwebakejez.pdf
    • https://cdn.shopify.com/s/files/1/0436/1617/4237/files/48453506068.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_off000076f3.bin
a17f64239151e44799117608e244f53228161a505a1d8cc5da129b951161cca4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76F3 4528 bytes
font_01_sfnt_off0000866a.bin
9ee75f42761ec80414822cc660643494a7cc196bdefcf39022d39350920cd0d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x866A 10128 bytes

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