Malicious PDF — malware analysis report

Static analysis result for SHA-256 165d0c708729dab1…

MALICIOUS

PDF

55.9 KB Created: 2020-07-27 05:42:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae0aea63f034797ecc5641b6edcf34fa SHA-1: bbfeb3c9219954c9221514f3b2c237898effb848 SHA-256: 165d0c708729dab1d41ba2acb4ce9b1dac95da18298f428426bcd32b6789b0af
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a link farm, with numerous embedded links, many of which are hosted on Shopify. The presence of a 'download button' heuristic further suggests a deceptive user interaction is intended. While no scripts were extracted, the overall structure and the malicious redirector strongly indicate a phishing or scam attempt.

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.ru/pify?keyword=genetec+training+manual
    • http://files.thepdavisphotography.com/uploads/1/3/0/7/130775366/novavuw_vazileb.pdf
    • http://files.turners121.com/uploads/1/3/1/3/131398333/pifekikexi_jexifelotido_feweguduzo.pdf
    • http://files.dartmouthlawnbowls.com/uploads/1/3/0/7/130739747/nudogonaz.pdf
    • http://files.artozan.com/uploads/1/3/1/8/131858592/6613488.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6116/5723/files/puxosop.pdf
    • https://cdn.shopify.com/s/files/1/0429/7129/9999/files/tigaguloraz.pdf
    • https://cdn.shopify.com/s/files/1/0428/1548/8163/files/sigatuxatatewifirawez.pdf
    • https://cdn.shopify.com/s/files/1/0439/1705/0008/files/mupufivigitepa.pdf
    • https://cdn.shopify.com/s/files/1/0433/6936/5654/files/90765982063.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53551688275.pdf
    • https://cdn.shopify.com/s/files/1/0432/6552/3862/files/14765516035.pdf
    • https://cdn.shopify.com/s/files/1/0437/4003/7271/files/ramovarob.pdf
    • https://cdn.shopify.com/s/files/1/0431/2226/2178/files/kaguwokajapuzazafufapu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5724/9430/files/43536041521.pdf
    • https://cdn.shopify.com/s/files/1/0430/6350/9141/files/22154443748.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kopamidije.pdf
    • https://cdn.shopify.com/s/files/1/0436/2420/2403/files/88787970038.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_off00009f33.bin
661d10bb5ffa71adfcdc813c7f1d531f87154a5b966413689cfd0c0f5b225467		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F33 4744 bytes
font_01_sfnt_off0000af3b.bin
fb19290c9c0f6b3f0cc26c838472995519f6460a622f1e936c8d6a11b2edadf4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF3B 10216 bytes

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