Malicious PDF — malware analysis report

Static analysis result for SHA-256 1110df701528db4b…

MALICIOUS

PDF

42.9 KB Created: 2020-08-18 15:12:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a73f0da491299e86d62b372d3c370940 SHA-1: 92898816ca108d4aadbb5ab9712e166c200d3df9 SHA-256: 1110df701528db4b0fef9ccb1273cfb6eecdfb3043a8ace7f4627b73fbd03ea7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a significant number of embedded links, many of which point to external PDF files hosted on various domains, suggesting a link farm or SEO manipulation tactic. One of the initial links directs to a known malicious redirector, indicating a potential for further malicious activity. The ML classifier also strongly flagged this PDF as malicious.

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.cc/pify?keyword=war+strategy+games+pc+free
    • http://vunomo.thehomoeopathicpractice.co.uk/uploads/1/3/1/8/131857631/zoveb.pdf
    • http://files.warrensmithdrums.com/uploads/1/3/0/8/130813314/d62cecd88b2.pdf
    • http://files.sugarcuppies.com/uploads/1/3/2/6/132681342/fejabalo.pdf
    • http://files.sbworldtravel.com/uploads/1/3/1/1/131164440/ridaxifixex-butozaja-wumib.pdf
    • http://juxepin.bcgoaltendingmuseum.com/uploads/1/3/1/4/131408899/jerobopesazalos.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/7824/6815/files/24124650715.pdf
    • https://cdn.shopify.com/s/files/1/0429/6884/2393/files/51086783746.pdf
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/92445147680.pdf
    • https://cdn.shopify.com/s/files/1/0432/8180/9558/files/ruxibefolomapanexejo.pdf
    • https://cdn.shopify.com/s/files/1/0454/6691/0872/files/jasidatiwefuz.pdf
    • https://cdn.shopify.com/s/files/1/0438/5223/4917/files/500_aptitude_questions.pdf
    • https://cdn.shopify.com/s/files/1/0435/3202/6008/files/53359821830.pdf
    • https://cdn.shopify.com/s/files/1/0435/4693/5445/files/waxesojazadomudavuxakok.pdf
    • https://cdn.shopify.com/s/files/1/0438/5662/5829/files/39460815185.pdf
    • https://cdn.shopify.com/s/files/1/0432/3088/8094/files/82625056043.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kesutuzijakakewinepubad.pdf
    • https://cdn.shopify.com/s/files/1/0438/6275/3445/files/libro_de_pares_biomagneticos_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0436/5228/4566/files/hbr_data_analytics_basics_for_managers.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069e6.bin
13c262ba0c0e61369ea718d50452a36a2f85ae0685686a92dd7a2fad0cdc4223		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69E6 5416 bytes
font_01_sfnt_off00007c56.bin
6005a71629f5a7ed2a73f4fb080ab660549e328ff86c305a9a0f173f0c5428cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C56 9944 bytes

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