Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dea937da9239726…

MALICIOUS

PDF

45.4 KB Created: 2020-07-25 17:01:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec254bf982375187613b01282db23cd5 SHA-1: 45320192e0c3676caca1e721919f09c1852c86f5 SHA-256: 8dea937da92397262ff5b83000b84a6d17dab85e134941ea6a65f65fc5b85937
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains multiple embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The primary malicious URL identified is 'https://ttraff.com/pify?keyword=super+nintendo+emulator++ios'. Another heuristic identified a PDF link farm, with a prominent example being 'https://cdn.shopify.com/s/files/1/0430/8402/1921/files/16437585633.pdf'. The ML classifier also strongly flagged this PDF as malicious. The document body appears to be heavily obfuscated or corrupted, preventing a clear understanding of its direct content, but the link analysis strongly suggests a malicious redirection or phishing 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=super+nintendo+emulator++ios
    • http://files.hkisia.org/uploads/1/3/1/3/131380591/dotuvuwuneleko-zuregedufo.pdf
    • http://files.demusproductions.org/uploads/1/3/1/6/131637679/6666b6e7c9b6a6.pdf
    • http://files.primrosehillpto.org/uploads/1/3/0/8/130874063/15a19c0aa0d04.pdf
    • http://files.lutesfamilyart.com/uploads/1/3/1/8/131857527/nonizo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8402/1921/files/16437585633.pdf
    • https://cdn.shopify.com/s/files/1/0431/3110/9540/files/96928607493.pdf
    • https://cdn.shopify.com/s/files/1/0437/4809/8209/files/16375016070.pdf
    • https://cdn.shopify.com/s/files/1/0434/5469/3537/files/wigejabiduboxer.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1297022614.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3592/files/gepepazopadezemaxaxusid.pdf
    • https://cdn.shopify.com/s/files/1/0431/6567/9776/files/zezesuvukesosonajifobotib.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/43377474007.pdf
    • https://cdn.shopify.com/s/files/1/0440/7204/2661/files/80086118999.pdf
    • https://cdn.shopify.com/s/files/1/0434/2874/1272/files/gakisud.pdf
    • https://cdn.shopify.com/s/files/1/0434/5584/0409/files/wizeporanep.pdf
    • https://cdn.shopify.com/s/files/1/0434/7995/7669/files/kejulukanebisupem.pdf
    • https://cdn.shopify.com/s/files/1/0430/6694/9786/files/76182098815.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/
    • https://cdn.shopify.com/s/files/1/0434/546

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072dc.bin
ee2b93897111deb7506fd207cf9a9d021c5168fc4127d47ad89ec7a616c99b92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72DC 5092 bytes
font_01_sfnt_off00008400.bin
7726f1c58687f221090e5e38f71038b15312dd5f3098fe03b0062007dd7fde60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8400 10712 bytes

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