Malicious PDF — malware analysis report

Static analysis result for SHA-256 366b2881defc0adf…

MALICIOUS

PDF

39.9 KB Created: 2020-08-02 02:03:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f842ee919d3bc09cdc50049f21a83d2e SHA-1: 1e50e4412f0ebccbadcb7372d1e86da8a30d345a SHA-256: 366b2881defc0adf6fe9450d43feedb6edc41c51a0f6ae27cbfb94623603c4a1
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Hell naw lyrics' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of a link farm and a malicious redirector indicates an attempt to drive traffic to malicious infrastructure.

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.cc/pify?keyword=hell+naw+lyrics
    • http://files.sallydearhealeyphd.com/uploads/1/3/0/8/130814043/gepilorivuv_retawejitapizop.pdf
    • http://files.patientmind.org/uploads/1/3/1/4/131406086/94f61f2a34def2.pdf
    • http://files.atlagit.com/uploads/1/3/1/3/131380741/7f5568d7cf88e52.pdf
    • http://files.landseerproperties.com/uploads/1/3/0/9/130969509/e9f27e58a90c.pdf
    • https://cdn.shopify.com/s/files/1/0430/8185/9225/files/67721886991.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bafewemuwidizisaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/3333/7768/files/nesolamarazadep.pdf
    • https://cdn.shopify.com/s/files/1/0431/8619/2546/files/71939557013.pdf
    • https://cdn.shopify.com/s/files/1/0430/5184/3733/files/bupesikizapavux.pdf
    • https://cdn.shopify.com/s/files/1/0435/7367/4142/files/83895333587.pdf
    • https://cdn.shopify.com/s/files/1/0430/6547/5229/files/daxapulakugukivoba.pdf
    • https://cdn.shopify.com/s/files/1/0434/7278/1478/files/wuwumukilubemitolamoxosu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3462/4668/files/42795301452.pdf
    • https://cdn.shopify.com/s/files/1/0429/4115/3439/files/63922192526.pdf
    • https://cdn.shopify.com/s/files/1/0431/0702/5060/files/6273642944.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/potoruter.pdf
    • https://cdn.shopify.com/s/files/1/0430/3932/6365/files/poluredakasajezowokosa.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_off00005fdd.bin
76bdaf0650825899a3261841c24eecc5ab7e579598c50339811a0e70a9cbb436		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FDD 4948 bytes
font_01_sfnt_off000070d3.bin
4e9e00c61d6138110ff617930169aaa29f76fcb55fcc6e5d96154b0b0805a9cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70D3 10012 bytes

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