Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ed8961a97ab4ba8…

MALICIOUS

PDF

47.1 KB Created: 2020-07-31 13:37:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef733f93a09970b52395e023603fe07e SHA-1: 480d6c9fd16f3ce159acf9e25a01fa7fae937b42 SHA-256: 7ed8961a97ab4ba8489b4da9f006e1f026b0335b510e66913e66e2acbf55a2f3
162 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.com, which is likely intended to lead the user to a malicious payload. The presence of a 'download button' lure and the ML classifier's high confidence score further support this assessment. Although no scripts were extracted, the PDF structure and embedded links indicate a malicious intent to redirect users to harmful content.

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.com/pify?keyword=pdf+a+word+programa+portable
    • http://files.elitetaxadvisory.com.au/uploads/1/3/1/4/131407194/fofelakinadukibisab.pdf
    • http://files.reptilefactorysocal.com/uploads/1/3/1/4/131410685/2632895.pdf
    • http://files.sjnbasketball.org/uploads/1/3/1/4/131409009/faa64a4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4845/9675/files/kajawisefowewemo.pdf
    • https://cdn.shopify.com/s/files/1/0440/8786/9592/files/gozumoradoboke.pdf
    • https://cdn.shopify.com/s/files/1/0430/4227/5485/files/vufufupofumezemotimu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6273/files/1577481484.pdf
    • https://cdn.shopify.com/s/files/1/0437/1437/9930/files/55744055501.pdf
    • https://cdn.shopify.com/s/files/1/0431/8042/5370/files/98482542527.pdf
    • https://cdn.shopify.com/s/files/1/0432/6824/3614/files/kewura.pdf
    • https://cdn.shopify.com/s/files/1/0429/0894/2499/files/70497648241.pdf
    • https://cdn.shopify.com/s/files/1/0434/1471/6572/files/28508027451.pdf
    • https://cdn.shopify.com/s/files/1/0435/4100/4443/files/49056287320.pdf
    • https://cdn.shopify.com/s/files/1/0437/2601/2567/files/95652593934.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_off0000792c.bin
6e219cb9c41494f3c360f764c017dcca5fbe9c1789e868ebd2cf06ca967a9b77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x792C 5052 bytes
font_01_sfnt_off00008a6b.bin
078a4a82493dfeb755c7e947a53e285ae4ce5989ce26fd5b977f82c61a568e68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A6B 11088 bytes

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