Malicious PDF — malware analysis report

Static analysis result for SHA-256 037f274680c7e0f1…

MALICIOUS

PDF

47.7 KB Created: 2020-07-31 05:30:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2fbcfd5f7c014181d178a26720a90e0e SHA-1: 68a4790a08e0a0b362709ec26a86d9a0525a34b0 SHA-256: 037f274680c7e0f1352b9b87135d1dd1eb80f8135222cdd618c0680a3aa93d80
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector, suggesting an attempt to lead the user to malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs further supports this assessment. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or redirection attack.

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=innovative+wastewater+treatment+resource+recovery+technologies+pdf
    • http://files.harmonizeyourspace.com/uploads/1/3/2/3/132302913/6922088.pdf
    • http://files.zanyunoodles.com/uploads/1/3/0/7/130739381/sikete-wemotuta.pdf
    • http://files.thepatternedpaperplate.com/uploads/1/3/1/3/131379949/80f867ad60113ed.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/4605/0728/files/banixokotinunozomes.pdf
    • https://cdn.shopify.com/s/files/1/0437/6828/3294/files/soferenavaselizax.pdf
    • https://cdn.shopify.com/s/files/1/0432/4553/5400/files/tegunegadoganomuzezodulo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5476/8021/files/90347480494.pdf
    • https://cdn.shopify.com/s/files/1/0429/3633/6540/files/kizetaxulimafibobexuzi.pdf
    • https://cdn.shopify.com/s/files/1/0434/1468/3813/files/dosasidojetedivarugiku.pdf
    • https://cdn.shopify.com/s/files/1/0435/3848/1320/files/keniti.pdf
    • https://cdn.shopify.com/s/files/1/0434/4738/6264/files/90276866356.pdf
    • https://cdn.shopify.com/s/files/1/0437/6687/4266/files/komewovud.pdf
    • https://cdn.shopify.com/s/files/1/0428/5893/8531/files/xavofukimale.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/72905654063.pdf
    • https://cdn.shopify.com/s/files/1/0433/7795/0881/files/rokulutobufapilot.pdf
    • https://cdn.shopify.com/s/files/1/0431/3628/6877/files/muxazuwefinijosakefokum.pdf
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/70259379386.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_off000078c3.bin
9ddb7c1d2ce9c71243217222758de2949d3067a1dea7da32cb8c38fb2d38e812		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78C3 5640 bytes
font_01_sfnt_off00008be5.bin
746576caf1d4222b756d57a0e6b449c20c80a9f09b60c55738b36e3ba52607ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BE5 10892 bytes

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