Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd5b31b4cfd0c458…

MALICIOUS

PDF

43.5 KB Created: 2020-08-19 16:46:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 053fbe37cd9e84b657fc071c36b477f9 SHA-1: b901f6cbf2c7c7d513630c14f09f4951f1733b93 SHA-256: bd5b31b4cfd0c4580e97dd43570e1dcfeff426f1485ad1ed19ce36717f7e7b30
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lure users to malicious content. The document body, while obfuscated, contains text related to a worksheet for class 1, suggesting a social engineering pretext. The presence of numerous external links, many pointing to Shopify domains, indicates a link farm strategy to obscure the ultimate destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=in+on+under+worksheet+for+class+1
    • http://files.dearborn411.com/uploads/1/3/2/7/132740860/xokagilo.pdf
    • http://files.stephenedwardmazujian.com/uploads/1/3/0/7/130740212/jijuwonivovana-womiwebelave-zilutodezumedi-guwonalibo.pdf
    • http://files.lisa-stanley.com/uploads/1/3/2/7/132740260/8fd48a9971c7559.pdf
    • https://cdn.shopify.com/s/files/1/0430/4899/2930/files/53545136033.pdf
    • https://cdn.shopify.com/s/files/1/0430/4551/9513/files/dictionnaire_bilingue_anglais_franais_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0434/7727/0692/files/zuxametisamoderip.pdf
    • https://cdn.shopify.com/s/files/1/0435/8150/5695/files/alloplastyka_stawu_biodrowego_pozowski.pdf
    • https://cdn.shopify.com/s/files/1/0431/8216/2084/files/43113448398.pdf
    • https://cdn.shopify.com/s/files/1/0432/3459/0882/files/spelling_words_for_grade_1.pdf
    • https://cdn.shopify.com/s/files/1/0434/4247/1064/files/32867993301.pdf
    • https://cdn.shopify.com/s/files/1/0434/6953/7432/files/favavazijijigibe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27150836515.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_off00006b9f.bin
8f94ced5b2c5e4dddd1a6ab79a2592ea392f6b3052cc073c32a8cb76f1fa04a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B9F 5252 bytes
font_01_sfnt_off00007d92.bin
0577ee813d47a3727586e06b9945f95739431eb46037f563b54ae46a9ab84877		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D92 10564 bytes

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