Malicious PDF — malware analysis report

Static analysis result for SHA-256 13025cd88cf365f0…

MALICIOUS

PDF

41.7 KB Created: 2020-09-20 09:21:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 149f6a02562a7ad89afcce7a46bd1ae4 SHA-1: b7d80656936e47ddd1c663bf2a3f054728165824 SHA-256: 13025cd88cf365f08e2797eecfeaba5786ea498d6bd171ea67aef5d160f6f97b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to a 'tractor jack for sale' and includes the malicious URL. This suggests a phishing or scam attempt to redirect users to malicious infrastructure.

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.me/wix?keyword=tractor+jack+for+sale
    • http://files.thefrancisfuneralhome.com/uploads/1/3/1/1/131164569/vepadodugubiz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://97575edb-84c6-44a8-8fe1-7303551cc8e3.filesusr.com/ugd/d63aaf_45dd2ac28445465aae04201657c5ad75.pdf?index=true
    • https://f4c3e6b2-4b8a-4cb5-b4d3-c6dbfb96b056.filesusr.com/ugd/7e84b7_836e393a5bf14ffe9fde5dce0ba0dd7d.pdf?index=true
    • https://8e732cd6-51bc-4390-b7d3-272bc78a17a4.filesusr.com/ugd/dba42a_b2540bd7204b4472b8a1395e99da22d5.pdf?index=true
    • https://1247bf05-1fac-47f5-99c1-03ee1809e7d7.filesusr.com/ugd/1be480_ecec1beb2ff24ddd883329fe62549418.pdf?index=true
    • https://561778b6-de71-410a-bb4f-b12922aa8618.filesusr.com/ugd/8e9e2f_50e23cc91f6d4079959cce7d7c65bb4e.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0430/8772/4704/files/kipetawuw.pdf
    • https://cdn.shopify.com/s/files/1/0431/0643/5232/files/64867924223.pdf
    • https://cdn.shopify.com/s/files/1/0436/4494/4542/files/bahra_lv_cables_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0430/8910/0957/files/87402341548.pdf
    • https://584539e6-b86d-43cf-9f2f-a7f584cb2e80.filesusr.com/ugd/9b2d9b_99ac40e7b95e4c3da41542eb3e624c54.pdf?index=true
    • https://100f1106-d854-49a6-a75e-5689d5dfd737.filesusr.com/ugd/de3d83_dd94d852047a46d58c42ef27b4d9fca2.pdf?index=true
    • https://7b9c3a22-7e10-4a52-8766-6eaf06c4a2aa.filesusr.com/ugd/0789d5_9383b7a221df4a95808f5a6e97556a16.pdf?index=true
    • https://827a2025-8388-4c7d-a768-9af8d03035bc.filesusr.com/ugd/ddb60a_8e3aaa6dc3fd4d3798ee03f8baf7f8d6.pdf?index=true
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006415.bin
279e8f63dbc4b83f94acd44be7bb5981de85ac63557c2a112e75e75c80058364		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6415 4964 bytes
font_01_sfnt_off0000750b.bin
8e1c71cc604566b35b06439e30149f871ca21af78c205154df8f35fdf135751f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x750B 10896 bytes

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