Malicious PDF — malware analysis report

Static analysis result for SHA-256 10cd08fb47a2d78a…

MALICIOUS

PDF

43.5 KB Created: 2020-08-25 15:55:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c836acd6d4d7685ce1f0df82b6436f1f SHA-1: d72302da6130bedb2861ce4a5b1b90f86c545b45 SHA-256: 10cd08fb47a2d78ad90051194ed0401ca400278e9088473575ad5bef6ea29916
154 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a known malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially garbled, contains text related to 'Beach buggy racing 2 cheat' and the malicious URL itself, suggesting a lure. The PDF_SEO_LINK_FARM heuristic indicates a large number of embedded links, many pointing to Shopify, which is likely a tactic to obscure the malicious redirector. No scripts were extracted, but the presence of malicious links is sufficient evidence 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.ru/pify?keyword=beach+buggy+racing+2+cheat
    • http://vesuzu.beavercreekbaptistchurch.com/uploads/1/3/2/3/132302751/b49b0f13147bce.pdf
    • http://files.elkrivertrack.org/uploads/1/3/1/4/131437680/1095121.pdf
    • http://files.ciicouncil.com/uploads/1/3/0/7/130775180/lizelirobab_ralesu_vutifes_kanino.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/4716/4826/files/cover_letter_template_illustrator.pdf
    • https://cdn.shopify.com/s/files/1/0439/2547/1400/files/44438741016.pdf
    • https://cdn.shopify.com/s/files/1/0437/1464/2070/files/78039885648.pdf
    • https://cdn.shopify.com/s/files/1/0436/6431/0425/files/company_christmas_party_invitation_templates.pdf
    • https://cdn.shopify.com/s/files/1/0434/3404/9703/files/84212867750.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3001/files/free_able_christmas_sheet_music_piano.pdf
    • https://cdn.shopify.com/s/files/1/0433/8620/8406/files/74229940121.pdf
    • https://cdn.shopify.com/s/files/1/0436/5520/0918/files/vidupovevuvoduxilagexi.pdf
    • https://cdn.shopify.com/s/files/1/0437/6566/1853/files/causas_de_la_contaminacion_del_aire.pdf
    • https://cdn.shopify.com/s/files/1/0435/6508/8917/files/sesuwez.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_off000069ba.bin
12a941c4b61e7887099cc762741277cad3a956f7a7d4587e1409be6d3c07d220		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69BA 5276 bytes
font_01_sfnt_off00007bb1.bin
970a3dc824bcc12b5ac5401ddb453c5e4dd6870cac83783462e445e939521c13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB1 11188 bytes

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