Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6d877b5ff627ea0…

MALICIOUS

PDF

49.1 KB Created: 2020-08-11 03:06:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a19a3eaf7b8c320f34ea4e00c0a87573 SHA-1: 37237f2fc89e4a3e4b641333f4a59c30e3f4b56e SHA-256: d6d877b5ff627ea001f0527139db024c271d3a7c71002775e7127f490e48ca94
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical link to a known malicious redirector infrastructure at 'https://ttraff.cc/wb?keyword=summarize%20spoken%20text%20pdf'. The document body, though heavily obfuscated, contains text suggesting it is a summary of spoken text, likely a lure. The presence of numerous PDF links, many hosted on Shopify, indicates a link farm SEO strategy to distribute the malicious content.

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.cc/wb?keyword=summarize%20spoken%20text%20pdf
    • http://files.podicongo.com/uploads/1/3/0/9/130969742/1659992.pdf
    • http://somuzav.atruechristian.com/uploads/1/3/0/7/130776485/pobemujatafuvel.pdf
    • http://files.bambooartscenter.com/uploads/1/3/1/8/131857071/pujeriwetid-napofemerumaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49893706483.pdf
    • https://cdn.shopify.com/s/files/1/0434/4479/7605/files/2015_acls_provider_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/8425/1285/files/98061616697.pdf
    • https://cdn.shopify.com/s/files/1/0428/3164/2780/files/48410754563.pdf
    • https://cdn.shopify.com/s/files/1/0430/3699/9842/files/94522281176.pdf
    • https://cdn.shopify.com/s/files/1/0432/3006/8898/files/47027492344.pdf
    • https://cdn.shopify.com/s/files/1/0437/3138/6517/files/axis_and_allies_board_game_rules.pdf
    • https://cdn.shopify.com/s/files/1/0431/7573/9553/files/zomuronijejunewugi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3886/6593/files/tapugisa.pdf
    • https://cdn.shopify.com/s/files/1/0431/3497/6157/files/database_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0432/8131/8056/files/30530670647.pdf
    • https://cdn.shopify.com/s/files/1/0429/9885/7891/files/15412274742.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_off000081bd.bin
448ea4d95e77a901c16ec6383de59fe0d466ce497ed4c99bf8dd19a610eb731a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81BD 5440 bytes
font_01_sfnt_off00009436.bin
cb635d4f7b50bfc5abf12d09fef912622fb5623aae969ff958bb9c7e96f46feb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9436 10392 bytes

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