Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbd17e9b6405adc2…

MALICIOUS

PDF

51.7 KB Created: 2020-08-19 10:23:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d202e8e56f05d0555b86489b613be670 SHA-1: d1c2977a94a38114397ee32f1f8fe7048cc098c4 SHA-256: cbd17e9b6405adc20072bd0425f016c7b22c1f7dc8268531c8ba498c9aacec1e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body also contains this URL, suggesting it's the primary lure. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm designed to attract search engine traffic, likely to obscure the malicious redirector. The ML classifier strongly supports the malicious verdict.

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=ark+survival+evolved+mobile+apk+aptoide
    • http://nefupumo.smile2340.com/uploads/1/3/0/8/130874493/pedede_rugolufeda_noxirivanusaf_tavika.pdf
    • http://vifizu.jonascain.net/uploads/1/3/1/3/131379866/pulezunikulu.pdf
    • http://dufuloben.scarboroughukes.com/uploads/1/3/0/8/130874380/5085397.pdf
    • http://fosojaza.yasminevintage.com/uploads/1/3/1/4/131452883/958762076bd29cc.pdf
    • http://serepipe.jlgpublishing.co.uk/uploads/1/3/2/6/132680813/4775040.pdf
    • https://cdn.shopify.com/s/files/1/0431/9058/3464/files/http_filesify._com_wr6jfm_password._txt.pdf
    • https://cdn.shopify.com/s/files/1/0451/0013/8661/files/analytical_chemistry_principles_and_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0431/5293/3019/files/85463632144.pdf
    • https://cdn.shopify.com/s/files/1/0431/2917/6232/files/suxirixezaginebob.pdf
    • https://cdn.shopify.com/s/files/1/0433/0808/9509/files/fun_brochures_templates.pdf
    • https://cdn.shopify.com/s/files/1/0427/7246/3772/files/91961405792.pdf
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/67934260962.pdf
    • https://cdn.shopify.com/s/files/1/0435/7079/0558/files/vizipinexajov.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bd4.bin
7d5952af810e51fbd31e8bb692fd575986631034c1bce0f05d32f917c415ff61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BD4 5360 bytes
font_01_sfnt_off00007deb.bin
49dddaa543544930169c80d10742cf71a10a90771d945bdf421e53748b1fa594		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DEB 2140 bytes
font_02_sfnt_off000087c5.bin
351ba029430e452297034e5803a1aad07b8a462efa429cd6b000d7aab1b067f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87C5 10096 bytes
font_03_sfnt_off0000aaa7.bin
a8f82ce1cdc57d6cf73caeb35ba0a534b8f114798d4dfc5d6ed82df03316e49d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAAA7 16384 bytes

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