Malicious PDF — malware analysis report

Static analysis result for SHA-256 0186ada8095ff2bd…

MALICIOUS

PDF

49.3 KB Created: 2020-08-18 20:02:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38d2b987899bb90a8a1b43c01be4db05 SHA-1: 625c9af10e1ce462062b4bc21a593fea2fae49b7 SHA-256: 0186ada8095ff2bde68097dc5c2d4f9edeedf7d241a7f879cff30d7b7036fed6
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to potentially malicious redirectors or link farms. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=csi+new+york+season+6+episode+guide'. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to external content. The ML classifier strongly flagged this PDF as malicious.

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.com/pify?keyword=csi+new+york+season+6+episode+guide
    • http://julebalop.myforeveryounghair.com/uploads/1/3/1/4/131453247/tapigilo.pdf
    • http://files.hitchhouseusa.com/uploads/1/3/0/7/130776590/644949.pdf
    • http://files.saugushighschoollearningcommons.org/uploads/1/3/0/9/130969791/8515688.pdf
    • http://zifofese.shapebham.com/uploads/1/3/1/4/131453541/1809524.pdf
    • http://files.catchamomentphotos.com/uploads/1/3/0/8/130814682/juxadotexuk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6918/5943/files/bollywood_songs_djmaza.pdf
    • https://cdn.shopify.com/s/files/1/0431/6453/2900/files/basal_cell_carcinoma_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0428/3963/8179/files/divipexelajewibi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5089/2454/files/cruel_angel_s_thesis_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0427/8029/5334/files/28397897028.pdf
    • https://cdn.shopify.com/s/files/1/0447/8251/8421/files/maragifak.pdf
    • https://cdn.shopify.com/s/files/1/0432/9563/7659/files/fewigizivipokawiluk.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27360052690.pdf
    • https://cdn.shopify.com/s/files/1/0435/5614/3265/files/barriers_to_entry_in_an_industry.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_off000079d1.bin
cc66de2c0e29774855afc4ebb9b4447de8dca1f925f941f6ededc5f9741012f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x79D1 5412 bytes
font_01_sfnt_off00008c5e.bin
e1410bf55a1917075feb998ee9027f8efea11fb4c35899c389f66c77e0a297fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C5E 14180 bytes