Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ee8189bf3e9cfd6…

MALICIOUS

PDF

46.9 KB Created: 2020-07-15 05:03:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8a6d6bb97b7030148437f49d14d7af7 SHA-1: ad124d8a296630b3274d125d65c5c22bed2dbc6b SHA-256: 9ee8189bf3e9cfd637b9786e2e809ed5c26bd21195b3cbb49aa70c5d94ba4228
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to redirectors and potentially malicious domains. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate that this document is designed to funnel users to harmful websites. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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/wb?keyword=service%20design%20principles%201-100%20pdf
    • http://files.mpmbowlny.com/uploads/1/3/0/8/130874110/6081140.pdf
    • http://files.thissideupimages.com/uploads/1/3/1/4/131408465/4fede2e694.pdf
    • http://files.cubatrips.ca/uploads/1/3/0/8/130813461/477705c.pdf
    • http://files.neilchalmers.com/uploads/1/3/0/8/130874369/9677219.pdf
    • http://files.vtfbla.org/uploads/1/3/0/8/130874435/wopikiz-fenulidema-kikin.pdf
    • http://files.thegotoschool.org/uploads/1/3/1/8/131856539/d411725ef.pdf
    • http://files.mawuviosoutreachprogramme.org/uploads/1/3/2/6/132682745/4876382.pdf
    • http://files.experienceyourdream.net/uploads/1/3/0/7/130775033/vetonebubavezeb-jafozuzofu-lurezogejap.pdf
    • http://files.experienceyourdream.net/uploads/1/3/0/7/130775033/vetonebubavez
    • https://gexefaduxoka.files.wordpress.com/2020/07/60251849395.pdf
    • https://lusenexovaj.files.wordpress.com/2020/07/dumufolazupuwi.pdf
    • https://kejovexa.files.wordpress.com/2020/07/walesogebavileza.pdf
    • https://pazodaz575687646.files.wordpress.com/2020/07/pusinera.pdf
    • https://cdn.shopify.com/s/files/1/0431/3009/3728/files/83928025164.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23342697578.pdf
    • https://cdn.shopify.com/s/files/1/0431/6630/2376/files/dilawujaziwa.pdf
    • https://cdn.shopify.com/s/files/1/0434/6147/6504/files/jaxobevivodikekunugenutu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5956/0094/files/lupobemix.pdf
    • https://cdn.shopify.com/s/files/1/0431/4162/8072/files/80044692268.pdf
    • https://cdn.shopify.com/s/files/1/0429/0235/6127/files/ligoku.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38655606666.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_off00007879.bin
93bc0ad90f3f161a5203e10a34e5b736809596060b25163412c9b27a7a47780a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7879 5100 bytes
font_01_sfnt_off000089e3.bin
8e03f8211adb56d5b6d81b96cc2a8a3b6b8601f3ceee4590fbf1108a10abc82f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89E3 10604 bytes

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