Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cc7e11566b6d27d…

MALICIOUS

PDF

38.6 KB Created: 2020-08-19 00:16:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cef2770113d012e484662e4681506f02 SHA-1: 97623a07c272b81d452d67b7b8b581a078b0acba SHA-256: 0cc7e11566b6d27d963ccb1a00cffe1bcd687a3481b06123bb6d0f16ff8012ed
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the URL 'https://ttraff.com/pify?keyword=clothes+worksheets+intermediate+pdf'. This indicates an attempt to lure victims through deceptive content, likely as part of a phishing or scam campaign. The ML classifier also 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.com/pify?keyword=clothes+worksheets+intermediate+pdf
    • http://files.communitychurchsheppey.com/uploads/1/3/0/8/130874318/49948dc.pdf
    • http://files.mbossinc.com/uploads/1/3/0/9/130969899/6890315.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zekimopesafirizaxos.pdf
    • https://cdn.shopify.com/s/files/1/0434/2913/4501/files/gavanesutifovijemiduxiko.pdf
    • https://cdn.shopify.com/s/files/1/0431/1692/0994/files/wamovesu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8942/8637/files/869733088.pdf
    • https://cdn.shopify.com/s/files/1/0429/1959/2103/files/16998331895.pdf
    • https://cdn.shopify.com/s/files/1/0429/5199/9637/files/tizidesagubilon.pdf
    • https://cdn.shopify.com/s/files/1/0428/7679/7081/files/xasebegiluvedivot.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_off00005995.bin
8ae4d955a168b4f00bf7553ade86a29f617dee1efbd73bb4c245743c6c93978c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5995 5344 bytes
font_01_sfnt_off00006b9f.bin
5e475f082ec9b61ea9d9a966384ea116e024d658bd333f692836037099475722		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B9F 10100 bytes

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