Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c1d1ae9a312b459…

MALICIOUS

PDF

44.6 KB Created: 2020-08-05 00:54:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1136b2f72031a59f668b75335048f21b SHA-1: 50af136b57a436e8d1a3f365339071de1c26249e SHA-256: 6c1d1ae9a312b459b45cb2fc0d8836d9d2ffdee4d2aa543533e7a2718776a5f6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of links, many of which point to a link farm designed to manipulate search engine results. One prominent link redirects to a known malicious infrastructure. The document body, though heavily obfuscated, contains the URL that initiates the redirection, suggesting a phishing or scam attempt.

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.ru/pify?keyword=arqueologia+mexicana+pdf+gratis
    • http://files.marciasantore.com/uploads/1/3/1/4/131455328/mobajeta_bolepomiva_menozale_mivibitebo.pdf
    • http://files.northumberland.westhistory.net/uploads/1/3/1/1/131164124/tuvilinatimovo_dokaruv_felirifol.pdf
    • http://files.mark-paul-smith.studio/uploads/1/3/2/7/132710678/kedulozuruba_guxixas.pdf
    • http://files.justbeingkaileyjo.com/uploads/1/3/1/4/131437379/5423849.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/6057/5912/files/begakosavawepogekazev.pdf
    • https://cdn.shopify.com/s/files/1/0434/0609/8597/files/ketogenic_diet_ebook.pdf
    • https://cdn.shopify.com/s/files/1/0430/4686/2997/files/14518731762.pdf
    • https://cdn.shopify.com/s/files/1/0430/8815/0690/files/kadaj.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/vehicle_inspection_form_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/3871/9648/files/faruzebiwizatowofus.pdf
    • https://cdn.shopify.com/s/files/1/0432/0336/2973/files/59964271425.pdf
    • https://cdn.shopify.com/s/files/1/0428/6509/8918/files/tezob.pdf
    • https://cdn.shopify.com/s/files/1/0428/5431/8239/files/jebojafunomidazos.pdf
    • https://cdn.shopify.com/s/files/1/0437/2345/6661/files/wokuf.pdf
    • https://cdn.shopify.com/s/files/1/0430/9411/4465/files/ritadazupogepaguve.pdf
    • https://cdn.shopify.com/s/files/1/0431/6990/6854/files/18615619603.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006227.bin
3293f417ca6c3fdd4a512b0f41ed367303b78c809b1dd9e6d47cad255dd121e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6227 5540 bytes
font_01_sfnt_off000074e1.bin
1f02e75459b4b4c48785b7191bbad850bba7f03efb5080b79e3eb3c57aff4920		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74E1 10372 bytes
font_02_sfnt_off00009768.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9768 4324 bytes

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