Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e1ec3b6944b099e…

MALICIOUS

PDF

42.8 KB Created: 2020-08-02 11:17:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00f726c40d9f59864b6251f011a4f034 SHA-1: e5a16637ba583eae44e1299d98ada8038e421c2a SHA-256: 0e1ec3b6944b099eb5dc68ab5804ee9e82b62a548fcd3c8ceba8ca0f879c58e8
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a lure suggesting an 'Espier notification ios7' and embeds numerous links, one of which points to a known malicious redirector. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document's intent is to trick users into installing software or updates. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=espier+notification+ios7
    • http://files.cassandraatcherley.com/uploads/1/3/1/4/131438843/bezarukamo.pdf
    • http://files.kids-connection.net/uploads/1/3/2/6/132682790/juwasutawuxo-kavisavas-jibanekorivu-sowawavafinidi.pdf
    • http://files.xrchurch.shop/uploads/1/3/0/8/130874031/a73e6b564eef.pdf
    • http://files.goboprojektor.cz/uploads/1/3/1/3/131379115/814c3ae8.pdf
    • http://leadbug
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6802/3194/files/85743995093.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/10588857949.pdf
    • https://cdn.shopify.com/s/files/1/0429/2670/2755/files/939903397.pdf
    • https://cdn.shopify.com/s/files/1/0435/5378/3957/files/besifuwusatuxi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7333/8533/files/gojegobatis.pdf
    • https://cdn.shopify.com/s/files/1/0430/3588/5725/files/49339575070.pdf
    • https://cdn.shopify.com/s/files/1/0431/6263/2360/files/jubusafodis.pdf
    • https://cdn.shopify.com/s/files/1/0433/2647/2345/files/7206292079.pdf
    • https://cdn.shopify.com/s/files/1/0430/3542/6970/files/bilopapekifuxifuxa.pdf
    • https://cdn.shopify.com/s/files/1/0430/5567/7591/files/wexozerebixujewufezapuram.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pepefawabibuf.pdf
    • https://cdn.shopify.com/s/files/1/0438/7130/5896/files/48082557841.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_off00006934.bin
6e8560a003ad54b52461418036880659f7d5d23d5596c013701f6b7f948eb8ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6934 5012 bytes
font_01_sfnt_off00007a5e.bin
c107d43e674987b8e6ede8e38ec36e85e3a7518ab39b60acd8ec01ed955557f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A5E 10580 bytes

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