Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ab3792afb5d5a6e…

MALICIOUS

PDF

33.6 KB Created: 2020-08-12 10:42:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86dff8e933feb906ee86fc08271fe408 SHA-1: 8e2b2d5f1b9f5404d3304e919ed2ea89b1fcaa34 SHA-256: 0ab3792afb5d5a6ecbab14975935e853bfc45718ca0d8a9c254e3b733dfc80a4
162 Risk Score

Malware Insights

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

The PDF contains multiple links, with one identified as a malicious redirector. The document body includes a call-to-action phrase suggesting a lure for users to click on these links. The presence of numerous external PDF links, including one pointing to a known malicious redirector, indicates a link farm or phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=convertidor%20de%20word%20a%20pdf%20gratis%20love
    • http://files.winterhomeschoolconference.com/uploads/1/3/1/4/131437655/xekekasiril-sedusudorawap-mifeniwetipomas-dinuwidutakezux.pdf
    • http://files.platinumdancecompany.com/uploads/1/3/0/7/130739393/3236644.pdf
    • http://bivuta.umna.org/uploads/1/3/2/6/132696051/c67293.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/1019/5605/files/xejoliseraginumizosavebij.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/demotufilonameviv.pdf
    • https://cdn.shopify.com/s/files/1/0437/6009/1287/files/catholicism_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/0905/6666/files/sixez.pdf
    • https://cdn.shopify.com/s/files/1/0434/1517/5335/files/florida_class_d_security_license.pdf
    • https://cdn.shopify.com/s/files/1/0437/5448/7969/files/rekalanunozukawudodaji.pdf
    • https://cdn.shopify.com/s/files/1/0437/7765/4935/files/bargaining_power_of_customers.pdf
    • https://cdn.shopify.com/s/files/1/0436/9825/8073/files/onan_generator_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/8048/2970/files/72472380818.pdf
    • https://cdn.shopify.com/s/files/1/0432/8341/5204/files/79561610765.pdf
    • https://cdn.shopify.com/s/files/1/0433/3751/5176/files/wurinezipet.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_off00004695.bin
2cd43efb54f23baee5c42158b24ffd886b8e19c5aa534d602831f301a856e31f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4695 5264 bytes
font_01_sfnt_off000058a0.bin
b72a9b0f4aa90d06865cb9bcb0a1262ca9c751543790c4c5251605c623464965		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58A0 9648 bytes

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