Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8eb33ef19bee75f…

MALICIOUS

PDF

44.2 KB Created: 2020-08-24 19:08:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e7c7e4c595994685a6e3a5041b69d1d SHA-1: 4abfb964dbb8a5d6cd87b630900124649c201e75 SHA-256: f8eb33ef19bee75f04cefe0704083d85b5f439fa2fd52efc7f3bae572aae609d
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, with one pointing to a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to manipulate search engine results or distribute further malicious content. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

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=android+translate+animation+repeat
    • http://vowov.fahadsiadat.com/uploads/1/3/1/4/131407552/05335451adb.pdf
    • http://files.mshaileyswebspace.com/uploads/1/3/1/6/131636990/bafinoxediz-wevulivaxepenov.pdf
    • http://files.hamdenfieldhockey.com/uploads/1/3/2/6/132682585/rovenovubaxufasi.pdf
    • http://jumekeri.raisingtheblues.net/uploads/1/3/1/4/131438405/nakuzuvi_fodezad_bufosa.pdf
    • http://xulaw.morschmachine.com/uploads/1/3/1/1/131164112/100912.pdf
    • https://cdn.shopify.com/s/files/1/0430/0242/9593/files/tomawi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1558/files/veruraweketaj.pdf
    • https://cdn.shopify.com/s/files/1/0438/6678/3904/files/enciclica_benedicto_xvi_dios_es_amor.pdf
    • https://cdn.shopify.com/s/files/1/0427/5470/3526/files/scriptures_on_business.pdf
    • https://cdn.shopify.com/s/files/1/0432/7217/5781/files/57705927751.pdf
    • https://cdn.shopify.com/s/files/1/0459/1730/7029/files/anime_offline_games_for_pc_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/9297/4499/files/celtic_rosenborg_tv_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/7061/9801/files/mumomej.pdf
    • https://cdn.shopify.com/s/files/1/0440/2734/7109/files/44168990250.pdf
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/pexedipozonigonitonunokik.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_off00006fa6.bin
d96362e32e66cbc990f22462b379ba8b10224c31a8599a23266dd8e558cdb7aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA6 5092 bytes
font_01_sfnt_off000080da.bin
17a6ae08346da333168427fc1c2edda76be1df6f64c2999d6875663d1082ca19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80DA 10128 bytes

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