Malicious PDF — malware analysis report

Static analysis result for SHA-256 51ee3becb0173e63…

MALICIOUS

PDF

42.1 KB Created: 2020-08-20 09:15:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b29a328abd0c6d82146e7e6fa948102d SHA-1: a69693ecb78df196c4f0b53d54cc17377040110e SHA-256: 51ee3becb0173e6342b4bc1ab48efb5db931ca599a1d2422a5650aa4817b4490
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with a critical heuristic firing indicating a link to a known malicious redirector. The document body, though heavily obfuscated, contains the same redirector URL. The presence of a large link farm suggests an attempt to manipulate search engine results or distribute malicious content through numerous indirect links.

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.cc/pify?keyword=boolean+search+cheat+sheet
    • http://files.wrapseshaz.com/uploads/1/3/0/8/130814283/4735917.pdf
    • http://files.thathippiephotography.com/uploads/1/3/1/3/131398135/femabubifudapona.pdf
    • https://cdn.shopify.com/s/files/1/0432/6670/3516/files/26603872615.pdf
    • https://cdn.shopify.com/s/files/1/0437/2067/1384/files/88641200860.pdf
    • https://cdn.shopify.com/s/files/1/0432/1266/9089/files/free_audio_bible_app.pdf
    • https://cdn.shopify.com/s/files/1/0430/8225/2442/files/purexenine.pdf
    • https://cdn.shopify.com/s/files/1/0436/9183/5547/files/vapenemigilasatesuzu.pdf
    • https://cdn.shopify.com/s/files/1/0440/0444/2262/files/barbarian_assault_guide_osrs_2018.pdf
    • https://cdn.shopify.com/s/files/1/0435/5640/5411/files/zekipewedewut.pdf
    • https://cdn.shopify.com/s/files/1/0447/8612/2901/files/list_of_silent_letters_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0431/1459/4464/files/ball_bricks_breaker_apk_mod.pdf
    • https://cdn.shopify.com/s/files/1/0430/7661/6353/files/lovogomedanaw.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_off00006887.bin
416f66f3700e1726564565e103ba6ee69ac5959ee9db6384fe2e0333247c0d0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6887 4936 bytes
font_01_sfnt_off00007940.bin
2fc23684cd82fabf9444416a0eb07878357f0c18181d26df7496e9f487d6b825		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7940 10208 bytes

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