Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaa368c5dc3f53c0…

MALICIOUS

PDF

51.8 KB Created: 2020-07-24 05:27:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d0622a6086fb2240b69f92941bb466f SHA-1: 80055ef6d7f8a24c009e714aa962b440d68c6d9a SHA-256: eaa368c5dc3f53c0db126777341c19a387d3ed8a48747db255595ecd01f5b1c9
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. Another critical heuristic identifies this as a PDF link farm, with many external links. The ML classifier also flagged this PDF as malicious with high confidence. The embedded URLs, particularly the redirector, are the primary indicators of malicious intent.

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=international+criminal+law+kriangsak+kittichaisaree+pdf
    • http://files.rearfacingtoddlers.com/uploads/1/3/1/6/131637814/4336359.pdf
    • http://files.hbbsbasingstoke.co.uk/uploads/1/3/1/8/131871786/3df2cc38fb.pdf
    • http://files.seattlefirstbaptist.org/uploads/1/3/2/3/132303080/81e42db7c9176.pdf
    • http://files.kenreif.com/uploads/1/3/0/8/130874671/73570b982ed7a1.pdf
    • http://files.lcandlepress.com/uploads/1/3/2/7/132741052/3272010.pdf
    • https://cdn.shopify.com/s/files/1/0435/0305/9110/files/kigefiko.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4016/files/godewabowoliribabo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1924/7514/files/19773862327.pdf
    • https://cdn.shopify.com/s/files/1/0435/3074/8072/files/zedajafarejeginutonivibig.pdf
    • https://cdn.shopify.com/s/files/1/0429/5183/5801/files/77695528081.pdf
    • https://cdn.shopify.com/s/files/1/0429/3050/3846/files/tojefuturonogoxafo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bopeberovejaxurid.pdf
    • https://cdn.shopify.com/s/files/1/0431/0247/0306/files/pajafasuxasovu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5371/1513/files/ludanizeka.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9870/files/63326663992.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wuwikeg.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6133/files/83735071358.pdf
    • https://cdn.shopify.com/s/files/1/0437/7211/7141/files/46220014280.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_off000080ff.bin
564a885e1e08b9491a04968fcc9278d7feb3aa92164d1487c58b4108d89c661e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80FF 5448 bytes
font_01_sfnt_off00009363.bin
2adfaf37285df287c5c99518fc74a1582e9967e0d9be5080a3443b6f02d3bf9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9363 15072 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.