Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aa73b8cba7faaaa…

MALICIOUS

PDF

43.7 KB Created: 2020-08-14 02:30:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bbec485d045b123976073db339db429 SHA-1: cddd0880d297650a9f25f3edee3cded92b52fa30 SHA-256: 1aa73b8cba7faaaaa3d0bdd425f40f597d3ee1aba439b59117d510982c1471ce
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Salesforce api guide pdf'. The primary attack pattern involves luring the user to click on malicious links, likely leading to further compromise.

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.ru/pify?keyword=salesforce+api+guide+pdf
    • http://files.kentuckianaelderlawadvocates.com/uploads/1/3/2/7/132740930/muzofubuwiwe.pdf
    • http://files.vintage3djoes.com/uploads/1/3/2/7/132740606/fcde078518.pdf
    • http://files.michianadrugtestingcenter.com/uploads/1/3/1/4/131407102/23326f72.pdf
    • http://files.petcardia.com/uploads/1/3/0/7/130776239/964814.pdf
    • https://cdn.shopify.com/s/files/1/0428/9645/7884/files/vanawozuruneruxadipu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kubogofire.pdf
    • https://cdn.shopify.com/s/files/1/0428/2230/3911/files/lista_vencida_axn_cover.pdf
    • https://cdn.shopify.com/s/files/1/0433/4154/5626/files/91857091474.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/sekineravujutapafizow.pdf
    • https://cdn.shopify.com/s/files/1/0435/3458/1911/files/61837219279.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/45624343095.pdf
    • https://cdn.shopify.com/s/files/1/0431/5830/6965/files/gosikimami.pdf
    • https://cdn.shopify.com/s/files/1/0432/3544/2855/files/26758495359.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_off00006d55.bin
682b74b0a764ee19b1337ba49e7924b07b5182667ef21286c5e766868517dbfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D55 5424 bytes
font_01_sfnt_off00007fcd.bin
9d3b0eafc2b011d78d1a1b10b1c2a0c1b42ea40ff548c6ef47a07d81372c7f0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FCD 10068 bytes

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