Malicious PDF — malware analysis report

Static analysis result for SHA-256 64deaa111d609a5d…

MALICIOUS

PDF

45.6 KB Created: 2020-08-21 22:11:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd1a487864359a911ad534a120a29350 SHA-1: 1a22a71208c499adae6d3ece22fb2e7207b64e84 SHA-256: 64deaa111d609a5d78b3dde9bdbcf72cc1bdb7e436d129fa8245802a614b2c56
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, disguised as an answer key. This redirector likely leads to further malicious content or exploits. The presence of numerous Shopify links suggests an attempt to blend in with legitimate content or to host payloads. The ML classifier strongly indicates malicious intent.

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.ru/pify?keyword=glencoe+health+chapter+24+assessment+answer+key
    • http://files.lephoartgallery.com/uploads/1/3/0/7/130740163/rarazubumonabebal.pdf
    • http://files.brooklyndreadlocks.com/uploads/1/3/0/8/130814644/mezozo.pdf
    • http://files.brailesshow.com/uploads/1/3/0/7/130776147/2849913.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41732402988.pdf
    • https://cdn.shopify.com/s/files/1/0439/5394/6782/files/78661618590.pdf
    • https://cdn.shopify.com/s/files/1/0440/6591/5045/files/convert_webpage_into_firefox.pdf
    • https://cdn.shopify.com/s/files/1/0429/2942/2499/files/wofadajajowokadali.pdf
    • https://cdn.shopify.com/s/files/1/0431/4116/9309/files/50602341974.pdf
    • https://cdn.shopify.com/s/files/1/0439/1141/3915/files/78806997395.pdf
    • https://cdn.shopify.com/s/files/1/0432/3462/3643/files/35941689380.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5079/files/adidas_platform_sneakers_black.pdf
    • https://cdn.shopify.com/s/files/1/0428/1827/3446/files/75976584154.pdf
    • https://cdn.shopify.com/s/files/1/0440/1466/5878/files/nedufifigis.pdf
    • https://cdn.shopify.com/s/files/1/0434/6462/2246/files/tosajejetivuwupeguwuro.pdf
    • https://cdn.shopify.com/s/files/1/0465/1774/7870/files/genetics_and_evolution_book.pdf
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/gezoxemar.pdf
    • https://cdn.shopify.com/s/files/1/0431/3009/3728/files/73945991929.pdf
    • https://cdn.shopify.com/s/files/1/0437/1077/5464/files/39438212793.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006496.bin
46804c9ab872d93536d1b8a6137ee0ab3207e3f114d039c7ab01b1b57b3399d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6496 5424 bytes
font_01_sfnt_off000076f0.bin
5b0d9085357943f27c677808b8cb40ef2ffb8552f2eb2bc759587f0628482373		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76F0 10636 bytes
font_02_sfnt_off00009b0f.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B0F 4324 bytes

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