Malicious PDF — malware analysis report

Static analysis result for SHA-256 848f7970b7c8c3ec…

MALICIOUS

PDF

41.5 KB Created: 2020-08-30 07:10:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 615a108ee442c075b833a04ab1a75f77 SHA-1: 0ce2a4972bfe1111dc257cbaeda675538855fb20 SHA-256: 848f7970b7c8c3ec605bd22ecdba217cb87338ec5f86ef348a4f2ebcd091fe4c
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Lego island xtreme stunts' and the malicious URL. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the presence of a link to malicious infrastructure, and PDF_SEO_LINK_FARM indicates a large number of outbound links, typical of SEO poisoning or link farm abuse to distribute malicious content.

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/wix?keyword=lego+island+xtreme+stunts
    • https://cdn.shopify.com/s/files/1/0429/5933/9674/files/nonorone.pdf
    • https://cdn.shopify.com/s/files/1/0434/2883/9581/files/pavoleranuxejufopibusuve.pdf
    • https://cdn.shopify.com/s/files/1/0434/5305/5128/files/genetic_engineering_tools_and_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0435/1731/3176/files/autocad_2017_kitap.pdf
    • https://static.usrfiles.com/ugd/d4da64_13263f701c2c48e7935e9e2d84d729cf.pdf
    • https://static.usrfiles.com/ugd/b8c837_f0a1acd69a744bdc87d22a4cbe0bff06.pdf
    • https://static.usrfiles.com/ugd/5b5da7_5ff9093e87654639a7794f3123dd3d65.pdf
    • https://static.usrfiles.com/ugd/b8c837_f6fa9a903a1f4da1a6b4070563175ce3.pdf
    • https://static.usrfiles.com/ugd/73f3b0_e18c2ebe71ea45e49a09398a5bb213b9.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vazakiliduvapi.pdf
    • https://cdn.shopify.com/s/files/1/0436/1306/1277/files/ruvimuvaponamagumibekut.pdf
    • https://cdn.shopify.com/s/files/1/0429/5078/7231/files/credit_dispute_letter_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/8501/2900/files/bolt_and_nut_manufacturing_process.pdf
    • https://cdn.shopify.com/s/files/1/0434/0586/9208/files/31561073768.pdf
    • https://cdn.shopify.com/s/files/1/0433/2729/1544/files/jelubofusus.pdf
    • https://cdn.shopify.com/s/files/1/0437/5291/5098/files/68178433672.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_off0000648a.bin
2355e4736e2646b5828fd95c5c699d3867aeadea886ce55b79cd80d1b7200e2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x648A 5156 bytes
font_01_sfnt_off00007601.bin
ae5a1c1ac67a48d61d7ae3807510c3e747c8cc3690c03e5be3db562906568ed4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7601 10396 bytes

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