Malicious PDF — malware analysis report

Static analysis result for SHA-256 6528ada5ef0fe4ff…

MALICIOUS

PDF

37.7 KB Created: 2020-08-31 02:02:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d691d30a50e6426de6db47e0fc39e51 SHA-1: f3f31ea844f242649094c0a119de2f9af3d56498 SHA-256: 6528ada5ef0fe4ffd74bdad877e046d41c694af593beaa9ed06e14e91162950c
154 Risk Score

Malware Insights

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

This PDF document contains multiple embedded links, with one specifically identified as a malicious redirector. The document's content, though obfuscated, appears to be a lure for game modification downloads, directing users to the malicious URL. The presence of numerous links suggests a link farm or SEO poisoning tactic to distribute the malicious payload.

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/wix?keyword=mod+gta+sa+android+skin+selector
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/a6e5e9_ab047ae1ecc84fa4b94027931b8d6d4f.pdf
    • https://static.usrfiles.com/ugd/2f3ac6_6f2e0611d2484de6805d16aa5bfaa804.pdf
    • https://static.usrfiles.com/ugd/1cc777_b5e8bc8956be4f4982006323903c9942.pdf
    • https://static.usrfiles.com/ugd/7f16bd_e9e44a44f50240afaf9d7c4379b86d38.pdf
    • https://static.usrfiles.com/ugd/191a6d_0d337d6e8f05429f8ea56997247f4e4b.pdf
    • https://static.usrfiles.com/ugd/b8c837_3c18c599f1804bd293cf5e7b71338cb3.pdf
    • https://static.usrfiles.com/ugd/b8c837_308bbcb111da4e6ebd05f5c33c41ef21.pdf
    • https://static.usrfiles.com/ugd/a8ca0f_d3b21ba2d88841bd9307085b86293ebd.pdf
    • https://static.usrfiles.com/ugd/45e30f_b4db727ab4494681b6bdbafead3a7b3a.pdf
    • https://static.usrfiles.com/ugd/2f8cea_062c58d4164b468da98a306b22dad526.pdf
    • https://static.usrfiles.com/ugd/be19e1_bc96f524fec54426a7c2e2d24b38c240.pdf
    • https://static.usrfiles.com/ugd/7dd30d_e44f05a730964e98a057407662eb901f.pdf
    • https://static.usrfiles.com/ugd/b8c837_45c65d7afac4466f8a70de0837cfa42f.pdf
    • https://static.usrfiles.com/ugd/173616_c6f8c46b292b40fc876e6826b68a2de4.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_off00004c4d.bin
0c78316aa86934b02782f13c79425bb08252fd210c35c6616c84981ef6fc370c
pdf-font-stream PDF embedded font (sfnt) at offset 0x4C4D 5176 bytes
font_01_sfnt_off00005dfe.bin
ea01a294a1ab506c2a30d1f2d4a0052f61c204d680cca18572f81aecae6ad90f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DFE 14084 bytes