Malicious PDF — malware analysis report

Static analysis result for SHA-256 efb49093fe663c5d…

MALICIOUS

PDF

40.1 KB Created: 2020-08-24 08:07:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd3bcbcc326356d56d08a3f6bfaf53c3 SHA-1: 78c1ecd70c05247bd16e7bd710c694a054789c41 SHA-256: efb49093fe663c5dce42d6a22fb8c94c6391bc8b383dde53a9bf01266296c900
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. This link is presented within the document body, disguised as a generator manual, likely to trick users into clicking it. The PDF also exhibits characteristics of a link farm, with numerous embedded links, many pointing to Shopify domains, but the primary malicious indicator is the ttraff.cc redirector.

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/pify?keyword=briggs+stratton+5500+watt+generator+manual
    • http://files.xnhat.org/uploads/1/3/1/4/131482946/7772705.pdf
    • http://dodoletig.texasphonerepairsupply.com/uploads/1/3/1/4/131406717/eba777a26239f.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5573/files/70339562220.pdf
    • https://cdn.shopify.com/s/files/1/0458/2860/4067/files/jelizaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/benubojebexoreloruva.pdf
    • https://cdn.shopify.com/s/files/1/0437/0300/9430/files/mivirowuwobuwuzepofer.pdf
    • https://cdn.shopify.com/s/files/1/0432/9000/1572/files/rajulozaziger.pdf
    • https://cdn.shopify.com/s/files/1/0430/8657/7828/files/32435446243.pdf
    • https://cdn.shopify.com/s/files/1/0431/5345/7320/files/7306544302.pdf
    • https://cdn.shopify.com/s/files/1/0460/3651/7028/files/mathematical_modeling_of_control_systems.pdf
    • https://cdn.shopify.com/s/files/1/0432/7630/4544/files/bulgakov_the_master_and_margarita.pdf
    • https://cdn.shopify.com/s/files/1/0431/6368/0929/files/definition_of_validity_in_research.pdf
    • https://cdn.shopify.com/s/files/1/0429/8414/5049/files/75530322074.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_off00005d3f.bin
610226c8b35acaefcf96a1359e975fc18cf7d3341609afe195f11f2bda7b3407		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D3F 5412 bytes
font_01_sfnt_off00006f9f.bin
3b733721aa198d11002db4e761257bfbb0029cdaefddbc56663d071a85abf563		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F9F 10548 bytes

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