Malicious PDF — malware analysis report

Static analysis result for SHA-256 c84f561b91c44d79…

MALICIOUS

PDF

161.8 KB Created: 2020-08-04 17:32:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12abbcecd0f45b98b7f323c6906dcf7c SHA-1: 71604a9d13844728bee943986b7b721ee8ed25d7 SHA-256: c84f561b91c44d795f2e2d46583141014dadf5e2d470882f1b9c0139dae7dc7e
92 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The embedded URL in the document body, 'https://ttraff.cc/pify?keyword=pierre+bourdieu+outline+of+a+theory+of+practice+pdf', is the primary indicator of malicious intent. The ML classifier also strongly flagged this PDF as malicious. The document's content appears to be a lure for a book download, which is a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • 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=pierre+bourdieu+outline+of+a+theory+of+practice+pdf
    • http://files.fishguyzscuba.com/uploads/1/3/1/4/131453421/3277708.pdf
    • http://files.relap.com/uploads/1/3/0/8/130873769/470017.pdf
    • http://files.bieresources.com/uploads/1/3/2/6/132683267/zivededozibik-tutol-pimizowajidiji-wakowovurojap.pdf
    • https://cdn.shopify.com/s/files/1/0428/0333/1231/files/55503255007.pdf
    • https://cdn.shopify.com/s/files/1/0429/9689/1807/files/48249160289.pdf
    • https://cdn.shopify.com/s/files/1/0430/0079/1191/files/sipaxesozikowe.pdf
    • https://cdn.shopify.com/s/files/1/0434/3857/1670/files/44112558236.pdf
    • https://cdn.shopify.com/s/files/1/0428/6555/7671/files/rixotadipipemal.pdf
    • https://cdn.shopify.com/s/files/1/0436/5221/9030/files/ensayo_sobre_el_feudalismo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3884/2779/files/zoneratikuguwuwijuxenid.pdf
    • https://cdn.shopify.com/s/files/1/0427/5834/0774/files/33169997077.pdf
    • https://cdn.shopify.com/s/files/1/0437/0019/1387/files/bufudaxuritaziliduve.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_off00022eec.bin
41a03a8e3d0a7b290a5e0cf5e47719e873eefff47f4bf288e07e06ebd0356112		 pdf-font-stream PDF embedded font (sfnt) at offset 0x22EEC 5308 bytes
font_01_sfnt_off000240f7.bin
75981f822a0c891b59ad39b96d706a53be92d8d125663e07d326f9c9b9e67e7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x240F7 17944 bytes

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