Malicious PDF — malware analysis report

Static analysis result for SHA-256 96a3e68303231e9b…

MALICIOUS

PDF

45.7 KB Created: 2020-08-12 18:58:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e65e6a72710e5680d70804e7ddce0c94 SHA-1: 1da6016a2af58bcde8975cd7f3c63494721e0e63 SHA-256: 96a3e68303231e9b45744a9c740ad61a62a6246ea9809b02cb8ddfc6e9a1f1fb
154 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, embedding numerous external links, with a significant portion pointing to Shopify-hosted PDF files. One critical heuristic identified a link to a known malicious redirector, indicating a potential phishing or malware distribution attempt. The ML classifier strongly supports the malicious nature of the file. No scripts were extracted, limiting the analysis of direct payload execution.

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.cc/pify?keyword=les+carnets+de+cerise+tome+2+pdf
    • http://nugowi.ovingpc.com/uploads/1/3/0/7/130739835/2d62f.pdf
    • http://files.silverrescue.org/uploads/1/3/1/3/131380128/dobafo_tananuxab_tumikub.pdf
    • http://files.personalspaceproject.com/uploads/1/3/2/7/132740343/piwepapefa-kavijabojexopi-fuwuwumewa.pdf
    • http://files.modernartphotograph.com/uploads/1/3/1/6/131636775/lofutaga_luxerefozir_ramasajukitekab.pdf
    • http://files.lowernorthcoastdancefestival.com.au/uploads/1/3/2/6/132681452/zogesimozojexek.pdf
    • https://cdn.shopify.com/s/files/1/0428/9282/0643/files/kalagabuzopovemixudoge.pdf
    • https://cdn.shopify.com/s/files/1/0440/5306/9974/files/advanced_windows_debugging.pdf
    • https://cdn.shopify.com/s/files/1/0432/2515/3698/files/dragon_ball_z_mugem.pdf
    • https://cdn.shopify.com/s/files/1/0429/5750/4668/files/73845478254.pdf
    • https://cdn.shopify.com/s/files/1/0436/5549/5833/files/97746762738.pdf
    • https://cdn.shopify.com/s/files/1/0429/5802/8959/files/vapafup.pdf
    • https://cdn.shopify.com/s/files/1/0431/4179/1900/files/38010044915.pdf
    • https://cdn.shopify.com/s/files/1/0432/0726/2367/files/rodegelenoxagupejusamakus.pdf
    • https://cdn.shopify.com/s/files/1/0438/1681/2706/files/41176334184.pdf
    • https://cdn.shopify.com/s/files/1/0430/0341/2633/files/palipufogimipularajiwemi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5232/7324/files/wonders_of_the_modern_world.pdf
    • https://cdn.shopify.com/s/files/1/0431/6728/5408/files/zezalewojonovijeximi.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_off00006dfa.bin
4d3508f1d800e2da3cbd83664d6d43d950e93c2b77f0f31af95d3f72437abf07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DFA 5340 bytes
font_01_sfnt_off00008010.bin
b910171f050bae7412263cb74d61f478d2d893b0cfcf0fe58633e4fe7c84dd16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8010 13048 bytes

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