Malicious PDF — malware analysis report

Static analysis result for SHA-256 8854445317f94527…

MALICIOUS

PDF

50.2 KB Created: 2020-08-31 21:45:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59a28dd745540932038194cde57d6af3 SHA-1: 7d204f4f5ec2d3948c02f380caa420c07843fdd7 SHA-256: 8854445317f9452774425a19a2f96d67fd00ea9eb99996c721be7d3f5255767f
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 (ttraff.com). The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to obscure malicious activity or distribute further content. The ML classifier strongly indicates maliciousness. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution 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.com/pify?keyword=brilliant+connect+app
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8055/6452/files/america_settentrionale.pdf
    • https://cdn.shopify.com/s/files/1/0429/1778/9862/files/76981377639.pdf
    • https://cdn.shopify.com/s/files/1/0429/6412/3814/files/27120888557.pdf
    • https://static.usrfiles.com/ugd/b8c837_fc25af426ad04839a74d89c065067bb3.pdf
    • https://static.usrfiles.com/ugd/79cb75_ddeb3f4771fb47efb1d201d9451f1b57.pdf
    • https://static.usrfiles.com/ugd/ce77c6_8fd5011d3d96491190b3c9f78cd6641e.pdf
    • https://cdn.shopify.com/s/files/1/0431/2317/9677/files/carranza_s_clinical_periodontology_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/1379/9064/files/palolinemoz.pdf
    • https://cdn.shopify.com/s/files/1/0432/9321/2827/files/mupofori.pdf
    • https://cdn.shopify.com/s/files/1/0435/6990/5825/files/ativador_office_2013_professional_plus_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0463/8847/8107/files/gevulekaxoz.pdf
    • https://cdn.shopify.com/s/files/1/0430/3051/1779/files/lipivinapuzi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8255/5300/files/c_vector_template_type.pdf
    • https://cdn.shopify.com/s/files/1/0464/5388/3048/files/free_modern_powerpoint_template_2018.pdf
    • https://cdn.shopify.com/s/files/1/0431/0892/5602/files/larifomilu.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_off000087db.bin
b616d200332ad8e05dba06950b9a214b6736b8e954d413b246477dc13c682447		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87DB 4796 bytes
font_01_sfnt_off0000983b.bin
d74da1022e0124b6dce03eb140f691a581437578aa68744f3cafcd42638d2a37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x983B 10424 bytes

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