Malicious PDF — malware analysis report

Static analysis result for SHA-256 068d224c43b62a69…

MALICIOUS

PDF

47.2 KB Created: 2020-07-31 18:05:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ee1e8e4d5ca04c9f6b0760736d179e8 SHA-1: 82357ab7a75f4e0ea4688f0267c412d04a96362c SHA-256: 068d224c43b62a690ee3b468b1543245efa77b84686a9e86e9faf1b44ee410b3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting an attempt to drive traffic to potentially malicious or scam-related content. The ML classifier also strongly flagged this PDF as malicious.

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.ru/pify?keyword=stanley+ka+dabba
    • http://files.citykidzmag.com/uploads/1/3/1/4/131453522/b3bef15785d.pdf
    • http://files.hpnlo.org/uploads/1/3/1/4/131437880/5509720.pdf
    • http://files.iliveinmycarandeatverywell.com/uploads/1/3/0/9/130969231/4909343.pdf
    • http://files.birthcontrolsafety.org/uploads/1/3/1/6/131637649/e8307c54067.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9400/7191/files/xeriz.pdf
    • https://cdn.shopify.com/s/files/1/0440/4012/6629/files/xobumonemuwugakam.pdf
    • https://cdn.shopify.com/s/files/1/0434/6285/2773/files/31184718815.pdf
    • https://cdn.shopify.com/s/files/1/0430/8549/6482/files/dadekisopoke.pdf
    • https://cdn.shopify.com/s/files/1/0440/4707/3445/files/fuwomeda.pdf
    • https://cdn.shopify.com/s/files/1/0432/4065/2960/files/xavijijosamajugulufezadu.pdf
    • https://cdn.shopify.com/s/files/1/0427/5906/1670/files/44987719893.pdf
    • https://cdn.shopify.com/s/files/1/0430/4837/0333/files/xuloku.pdf
    • https://cdn.shopify.com/s/files/1/0430/7048/8730/files/laposakefonevamiv.pdf
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/puxunujamapoxomir.pdf
    • https://cdn.shopify.com/s/files/1/0429/5960/1830/files/87983419476.pdf
    • https://cdn.shopify.com/s/files/1/0432/5372/7387/files/rizukexoroter.pdf
    • https://cdn.shopify.com/s/files/1/0432/2469/4939/files/xexokiwi.pdf
    • https://cdn.shopify.com/s/files/1/0435/5129/3599/files/47355726132.pdf
    • https://cdn.shopify.com/s/files/1/0430/9699/8048/files/xofopumulure.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000668c.bin
3f5ba606582e2b947f6e2613a4c33e6d1a5592db256d90254a1e1ace94f477e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x668C 4956 bytes
font_01_sfnt_off0000777e.bin
853c8a1743de65abb6b1c325e14a2208eb4704937d3df69e5fc664b39c180539		 pdf-font-stream PDF embedded font (sfnt) at offset 0x777E 10184 bytes
font_02_sfnt_off00009a98.bin
6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A98 16164 bytes

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