Malicious PDF — malware analysis report

Static analysis result for SHA-256 b902002eb2e4e30b…

MALICIOUS

PDF

35.9 KB Created: 2020-08-04 20:44:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf81d30b4b73ebc65a683ef50ee49dbb SHA-1: 5a9ba40415629f9b5445dbac247f35a6452d02a4 SHA-256: b902002eb2e4e30b7ffaa8b2f3ccc8a75b87a8e9b769abb45337e2d9ee11d5df
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=reglas+para+nombrar+alcanos+alquenos+y+alquinos+pdf'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with the primary one leading to a Shopify domain. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains references to academic topics and the malicious URL, suggesting a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.
  • 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=reglas+para+nombrar+alcanos+alquenos+y+alquinos+pdf
    • http://files.imagesbytimhammond.com/uploads/1/3/0/9/130969377/pojonixu.pdf
    • http://files.wusdtechfaq.com/uploads/1/3/1/1/131164063/kudupixuvutagog-wegelojaxo-lizelajij-jujevurudazode.pdf
    • http://files.evangghana.org/uploads/1/3/1/4/131453718/8603152.pdf
    • http://files.heartbirthandbaby.com/uploads/1/3/2/6/132695535/9707626.pdf
    • http://files.marylandsoups.com/uploads/1/3/1/4/131406372/nigawavili.pdf
    • https://cdn.shopify.com/s/files/1/0437/2607/8101/files/xomitirakulogarulamos.pdf
    • https://cdn.shopify.com/s/files/1/0434/2503/8498/files/13286489158.pdf
    • https://cdn.shopify.com/s/files/1/0431/1888/7068/files/regents_exam_in_ela_common_core.pdf
    • https://cdn.shopify.com/s/files/1/0431/4074/3330/files/buzedasuwamepufemimodesak.pdf
    • https://cdn.shopify.com/s/files/1/0428/6332/9446/files/16818382137.pdf
    • https://cdn.shopify.com/s/files/1/0435/5643/8165/files/fatisinubafo.pdf
    • https://cdn.shopify.com/s/files/1/0436/3331/1904/files/vikuxugidugafarimexasofup.pdf
    • https://cdn.shopify.com/s/files/1/0429/8326/0314/files/xutilemaxezi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7511/6959/files/18680200758.pdf
    • https://cdn.shopify.com/s/files/1/0430/8199/0295/files/73648718409.pdf
    • https://cdn.shopify.com/s/files/1/0429/5353/9747/files/convert_seconds_to_minutes.pdf
    • https://cdn.shopify.com/s/files/1/0433/0363/3051/files/26776021541.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_off00004cea.bin
b47e54fd32da8d3d37a168abb976562eb96bfc0f11539a7e289804efdf753d11
pdf-font-stream PDF embedded font (sfnt) at offset 0x4CEA 5848 bytes
font_01_sfnt_off000060c3.bin
b9dfbdae96d1b039e8c2d8dc186b60907a86b885bcafad62834412ee7af0bce5
pdf-font-stream PDF embedded font (sfnt) at offset 0x60C3 9624 bytes