Malicious PDF — malware analysis report

Static analysis result for SHA-256 58678e5c11037b13…

MALICIOUS

PDF

48.1 KB Created: 2020-08-10 02:24:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: f166b5ab57319b7a099f3f477850ffbb SHA-1: b87c1d373715e1ffb9728b80c4e99145ec02d6bc SHA-256: 58678e5c11037b13f90f92b493c9d797df224252e9f6b840f32c229f7b5cb57b
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a link farm designed to generate traffic and potentially lead users to malicious sites. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be part of this redirection scheme, suggesting an attempt to trick users into downloading further malicious 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=pathfinder+pawns+bestiary+box+pdf+free In PDF document text
    • http://sunigiga.shannonmcferrinfineartist.com/uploads/1/3/1/4/131406717/636389.pdfIn PDF document text
    • http://files.woodlandsfrenchies.com/uploads/1/3/1/3/131383553/buvomagedax_dopiriveluk.pdfIn PDF document text
    • http://files.oldhamtinkers.com/uploads/1/3/1/1/131163902/zepabijon-tawexajogopuw.pdfIn PDF document text
    • http://files.southernairehuskies.com/uploads/1/3/1/6/131606016/zunoxaxamuraw-wiwovuvaxe-gomaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7974/6201/files/99797158414.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7085/7122/files/express_vpn_login.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7061/1861/files/25482550196.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8475/8696/files/49467744028.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6728/5408/files/adobe_after_effects_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8532/3683/files/32570690495.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9014/0581/files/jefoxixiwuba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1011/2163/files/addressing_barriers_to_learning_a_south_african_perspective.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7379/8306/files/pewizesoborofen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4607/5542/files/malwarebytes_2._2._0_serial_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2718/5309/files/60547305014.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7181 5500 bytes
SHA-256: 66fabec6982f3a983217abf29124be764190fde2b1ba58c9bfd4dbb3aed8a7d7
font_01_sfnt_off00008444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8444 15220 bytes
SHA-256: aabe93231514211485754aa15ada63c1641afe4d2d2cd31211773943e7986b22

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