Malicious PDF — malware analysis report

Static analysis result for SHA-256 647745652106855d…

MALICIOUS

PDF

42.7 KB Created: 2020-08-02 04:54:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c394c2b29906d263b77f91cb101485c8 SHA-1: 77fd8930c00dc3d1ac5d4ec6ed8ee3da1d7c949e SHA-256: 647745652106855dadd5bd42a90fcfaabccd583a23848afa101bd2da54856a47
154 Risk Score

Malware Insights

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

The PDF contains embedded links that lead to a redirector service, which is a common tactic for distributing malware or phishing pages. The ML classifier strongly indicated maliciousness, and the presence of numerous external links suggests a link farm used for SEO poisoning or traffic generation. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to harmful content.

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=sound+of+silence+download
    • http://files.uottawabgsa.ca/uploads/1/3/1/4/131483336/12b5d63ea01d9ea.pdf
    • http://files.pegsjewels.com/uploads/1/3/2/3/132303020/pobinojafisufat.pdf
    • http://files.cutediner.com/uploads/1/3/2/6/132682063/a887b3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/1324/9946/files/arhu_s_failed_experiment.pdf
    • https://cdn.shopify.com/s/files/1/0433/1097/3083/files/furibolosugoje.pdf
    • https://cdn.shopify.com/s/files/1/0434/3431/1845/files/xozemuzopo.pdf
    • https://cdn.shopify.com/s/files/1/0440/7354/9974/files/52888067025.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/golizikedakumeru.pdf
    • https://cdn.shopify.com/s/files/1/0430/1747/0101/files/97896135849.pdf
    • https://cdn.shopify.com/s/files/1/0431/5293/3019/files/21883651849.pdf
    • https://cdn.shopify.com/s/files/1/0429/0933/5715/files/towuxegawozamapudaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/8515/9843/files/11698051166.pdf
    • https://cdn.shopify.com/s/files/1/0433/9102/5306/files/fanelovenamefejodis.pdf
    • https://cdn.shopify.com/s/files/1/0436/3537/6281/files/61429760818.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wetidolurat.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_off000057a8.bin
d296849fd56b48f06a934c7f6886cbd7b6bc18e66e2fe675df37825bdcb796df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57A8 4916 bytes
font_01_sfnt_off00006877.bin
da754d8960ec820997d346316c7ececef26083f366672a5c44d0c7db013cd5a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6877 13668 bytes
font_02_sfnt_off00008fba.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FBA 4324 bytes

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