Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a6d626f2dc5eecc…

MALICIOUS

PDF

59.1 KB Created: 2020-08-03 06:59:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 86ff4a99407052f07796914eafd49667 SHA-1: 2439377a2316f4a0969eb21115c371d865486790 SHA-256: 0a6d626f2dc5eecc21e128ac35bbf2282cebc1bd5398fe8305ec5f7523b1db43
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination of the malicious content. The document body, though heavily obfuscated, contains the URL and suggests a lure related to 'Java scanner file'. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy, likely for SEO poisoning or to distribute the malicious payload. The ML classifier strongly flagged this PDF as malicious.

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.cc/pify?keyword=java+scanner+file In PDF document text
    • http://files.renaissanceflyrods.com/uploads/1/3/1/3/131378942/486feaf4d9.pdfIn PDF document text
    • http://files.baijingbox.com/uploads/1/3/0/9/130969809/95a41c.pdfIn PDF document text
    • http://files.svbarnquilts.org/uploads/1/3/1/8/131871535/2393648c87d309c.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/1/0433/4141/4555/files/zinukof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3825/0910/files/herobrine_s_mansion_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6857/1294/files/45714028985.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3228/9178/files/lovijakedolemabugetasa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8092/4837/files/vibonulemozorozubopag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8089/3084/files/75120955348.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3095/4655/files/lil_whyte_album.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7358/3781/files/39792788262.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0151/2090/files/90923567762.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4273/4229/files/33459620832.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_off0000a68d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA68D 4924 bytes
SHA-256: f8ea8ffb0b4921f471ff556d82a87cee7ba304ccecf7ab0bf1468cefd1cfb98b
font_01_sfnt_off0000b766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB766 12292 bytes
SHA-256: 53d5c5ac22213ad9ec86956b155ae155a79d84f63deb46b3c7c0e585eace6fbf

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