Malicious PDF — malware analysis report

Static analysis result for SHA-256 212a3581f391b69d…

MALICIOUS

PDF

42.6 KB Created: 2020-09-12 20:54:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08dc4f9806b904169b45a914d0adeeb8 SHA-1: 27672929c2af6fcfed1b7a6bbf17e2db277d3735 SHA-256: 212a3581f391b69dd133f1a471d542db95ce1435b5b307a899ed0a7fde6d6fbb
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one pointing to a known malicious redirector. The document body, though obfuscated, contains a URL that appears to be a lure for a game guide, likely intended to trick users into visiting malicious sites. The ML classifier strongly indicated maliciousness, and the presence of a link farm further supports a malicious intent to redirect users to potentially harmful content.

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.me/pify?keyword=nier+automata+side+quest+guide
    • http://files.evolvevolleyball.com/uploads/1/3/1/4/131411024/b1a1f.pdf
    • http://gewukij.aksimsurgical.co.uk/uploads/1/3/0/8/130813747/9484774.pdf
    • http://widajufi.depthstiny.com/uploads/1/3/0/8/130814579/jajuvabegojenoj.pdf
    • http://gabewos.tauntonwomensaid.org.uk/uploads/1/3/2/8/132815806/xusipojesiroze.pdf
    • http://files.pageantdoll.com/uploads/1/3/0/8/130813458/xizovuwu.pdf
    • http://files.torontoflowergallery.com/uploads/1/3/1/4/131453555/8625456.pdf
    • http://files.akashachamberlain.com/uploads/1/3/2/6/132682970/gavanolu_tutubamemeber.pdf
    • http://files.luxuezheng.com/uploads/1/3/1/3/131379014/bomifiwumuk.pdf
    • http://files.thetracklesspath.com/uploads/1/3/1/4/131407849/tawoxepovu.pdf
    • http://files.spicecommunity.org/uploads/1/3/0/9/130969489/lalokimajogeka.pdf
    • https://static.usrfiles.com/ugd/f459ea_c4610389f1fa42a7af599ddf573a9cf9.pdf
    • https://static.usrfiles.com/ugd/8d0191_b968130ea7ef491f95f25cf4f62e2d4d.pdf
    • https://static.usrfiles.com/ugd/02631b_964a987d576748ff91e84720a758b728.pdf
    • https://static.usrfiles.com/ugd/b58d21_99cb5550fad2403ea93e68fbdf9e1a07.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006941.bin
8ed0de9bd9a7cce9e4d528c9540840ebe0ae95643fd23593240fc93d1538e582
pdf-font-stream PDF embedded font (sfnt) at offset 0x6941 5208 bytes
font_01_sfnt_off00007ad8.bin
86dfd9e257a945e2c2cb882e322e430c0973553f948c7cf9df1e85fd8bfc2350
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD8 10340 bytes