Malicious PDF — malware analysis report

Static analysis result for SHA-256 27102a05e573db37…

MALICIOUS

PDF

42.7 KB Created: 2020-08-05 02:36:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e09dc9621de1195936c356c48e5e9f8 SHA-1: 9c035383998b6d82f614d0310e3655cdd8a48289 SHA-256: 27102a05e573db376bfb9bf35225a7dfd0df06f1ca4d94483eefdd4f0629b829
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link that redirects to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=anime+anatomy+tutorial+pdf', which is likely intended to trick the user into clicking it. The PDF also hosts a large number of external links, suggesting a link farm for SEO manipulation or to distribute further malicious content.

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=anime+anatomy+tutorial+pdf
    • http://files.therisingsuncottage.com/uploads/1/3/0/8/130874536/futuno_wumitusig.pdf
    • http://files.ocdandanxietycounseling.com/uploads/1/3/1/6/131637896/luwixozisuxod_daroxaduguw.pdf
    • http://files.cityofrefugeucc.org/uploads/1/3/1/1/131163684/mujegozapuwug-logizu.pdf
    • http://files.davidebonazzi.com/uploads/1/3/1/4/131455158/gubegi-doserezezetolot.pdf
    • http://files.greatcbi.com/uploads/1/3/0/7/130776327/d183373756bdc17.pdf
    • https://cdn.shopify.com/s/files/1/0432/7089/7824/files/xefamelaketawiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/3170/7294/files/watson_behaviorisme.pdf
    • https://cdn.shopify.com/s/files/1/0431/4936/1314/files/22694119029.pdf
    • https://cdn.shopify.com/s/files/1/0430/8926/4794/files/maplestory_buccaneer_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/4619/7653/files/90049848787.pdf
    • https://cdn.shopify.com/s/files/1/0429/9037/0975/files/banerjee_duflo_poor_economics.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66083684812.pdf
    • https://cdn.shopify.com/s/files/1/0440/2338/2174/files/lipegijirajawadifiraro.pdf
    • https://cdn.shopify.com/s/files/1/0431/1816/6167/files/anemia_penyakit_kronis_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0429/2762/0263/files/kapamibokobefakanaji.pdf
    • https://cdn.shopify.com/s/files/1/0436/9724/2280/files/78619503897.pdf
    • https://cdn.shopify.com/s/files/1/0436/0686/8126/files/cristianismo_puro_e_simples.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069e0.bin
ed395d1063473e085a784ecb361ae25bb4551cd61ab973ac5f2c416b0c876a93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69E0 5100 bytes
font_01_sfnt_off00007b2f.bin
56408aa6c52edae8dba38ca588e0e4d1e923ac588ea22e6b4a3f1f5ace2bd3c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B2F 10216 bytes

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