Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f9b27c776378435…

MALICIOUS

PDF

33.8 KB Created: 2020-08-19 00:14:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e61a244620dbf11d8920bd4a4fae852 SHA-1: f42a19cbdfadbe52ba645446f64874261853f3ec SHA-256: 6f9b27c77637843556a6c3c4381eb00ed40073eafba8c78e3c76e1e61a5620f0
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a malicious site. The presence of a link farm suggests an attempt to obscure the malicious destination or to leverage SEO tactics for distribution. No scripts were extracted, but the structure and heuristics strongly indicate a phishing or redirection 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=lagu+oh+asmara+versi+reggae+ska
    • http://nirojo.naturecalling.us/uploads/1/3/1/4/131410227/4933389.pdf
    • http://files.worldheritageconsultant.com/uploads/1/3/1/4/131406337/fufiladibepupabesuj.pdf
    • http://wudefirof.dontbeacrashtestdummy.com/uploads/1/3/2/7/132740285/jozuj-zuguzun-jebevo-wimuvitosu.pdf
    • http://files.azwatersolutions.com/uploads/1/3/2/6/132681352/5e3982aa0d4.pdf
    • http://bajimejog.elikalnonwoven.com/uploads/1/3/0/7/130775537/2787158.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/2936/3878/files/android_auto_honda_fit_2019.pdf
    • https://cdn.shopify.com/s/files/1/0427/8062/3015/files/7455910272.pdf
    • https://cdn.shopify.com/s/files/1/0428/8364/5599/files/52969352560.pdf
    • https://cdn.shopify.com/s/files/1/0447/0787/2921/files/money_manager_badge_requirements.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/felamisakawubibaxejurelok.pdf
    • https://cdn.shopify.com/s/files/1/0432/6440/9764/files/semezed.pdf
    • https://cdn.shopify.com/s/files/1/0440/1519/0181/files/79455089532.pdf
    • https://cdn.shopify.com/s/files/1/0430/5456/3477/files/sedufefomududek.pdf
    • https://cdn.shopify.com/s/files/1/0429/7120/1695/files/80509903322.pdf
    • https://cdn.shopify.com/s/files/1/0434/0649/1797/files/vamosatidizuza.pdf
    • https://cdn.shopify.com/s/files/1/0437/9430/1085/files/28380598581.pdf
    • https://cdn.shopify.com/s/files/1/0431/0351/8882/files/santa_biblia_reina_valera_1960_descargar_gratis.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_off0000490a.bin
ffbbdaa957dd2dfddf2611dd86b2cbc27563886d738272b9c71772838a6bc4e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x490A 5132 bytes
font_01_sfnt_off00005a6b.bin
dd97fd12a0000ebf206c4726785ad110a6def666e99ee21f884d988434fe4df2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A6B 9376 bytes

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