Malicious PDF — malware analysis report

Static analysis result for SHA-256 5242ed3d8b5febef…

MALICIOUS

PDF

103.1 KB Created: 2020-07-28 00:06:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b32d3e8cbe18310d1d8934079143d80 SHA-1: b90e41638c6336859f74d4bf4c570334997d586c SHA-256: 5242ed3d8b5febefd9d54fe4031f6f5278d6d0b3ab35ca49045773c431c83077
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious File T1059.001 PowerShell

The PDF file contains multiple embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to "Cablevision tv guide yonkers ny". The presence of a PDF link farm heuristic further suggests an attempt to distribute malicious content or drive traffic to compromised sites. The ML classifier strongly indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.com/pify?keyword=cablevision+tv+guide+yonkers+ny
    • http://files.thisauthentichome.com/uploads/1/3/0/7/130775603/vuxidopovinivixas.pdf
    • http://files.troop437roslyn.com/uploads/1/3/2/8/132815172/9085aef.pdf
    • http://files.ptwmlc.com/uploads/1/3/1/8/131871605/matenerosedaxez_gavudejogote.pdf
    • http://files.becomebettertv.com/uploads/1/3/1/3/131397940/5834046.pdf
    • http://files.kinderdancemetrostl.com/uploads/1/3/2/3/132302759/linarufivijidi.pdf
    • https://cdn.shopify.com/s/files/1/0435/7767/1843/files/tiwenobitojifitofejemewob.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/1862601706.pdf
    • https://cdn.shopify.com/s/files/1/0429/1877/2903/files/navojawilozepakitoneta.pdf
    • https://cdn.shopify.com/s/files/1/0429/9853/0202/files/jifozijuxuzovekinonagaw.pdf
    • https://cdn.shopify.com/s/files/1/0435/5381/6728/files/rixizowusawusuvizut.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/55041790463.pdf
    • https://cdn.shopify.com/s/files/1/0440/8619/8424/files/zokasetasufu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/32296276854.pdf
    • https://cdn.shopify.com/s/files/1/0432/0994/9341/files/41880298974.pdf
    • https://cdn.shopify.com/s/files/1/0430/6560/6301/files/78626091265.pdf
    • https://cdn.shopify.com/s/files/1/0433/7926/1590/files/87072374382.pdf
    • https://cdn.shopify.com/s/files/1/0433/6825/1543/files/83046245074.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_off000149e5.bin
086bfe199ec9ccb5883ae24712f666bc91c28fdcb7f1e51c5ab2a05ee8135ebd
pdf-font-stream PDF embedded font (sfnt) at offset 0x149E5 5264 bytes
font_01_sfnt_off00015be0.bin
be5fe694722771c36ca717fd46d69b300a8631fa55b0b8f5639da098b30cf5a9
pdf-font-stream PDF embedded font (sfnt) at offset 0x15BE0 15660 bytes