Malicious PDF — malware analysis report

Static analysis result for SHA-256 65719691a91a4447…

MALICIOUS

PDF

47.6 KB Created: 2020-08-12 07:56:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00718b788afa01d610d9a1263b74954a SHA-1: 95bc3c35753ab7adc3656cca0d458d19e74ffb50 SHA-256: 65719691a91a4447613e6e7207f8f110a256d26b8fda3626e4b95d6210fb7095
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of many Shopify-hosted PDF links indicates a link farm SEO tactic to improve search engine ranking for malicious content.

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=atoms+for+peace+eisenhower+pdf
    • http://files.mentalhealthandwellnessllc.com/uploads/1/3/0/8/130874524/xezerigudazopiziko.pdf
    • http://naxagu.lilylunaa.com/uploads/1/3/1/3/131382406/3090d76fbb.pdf
    • http://files.newyorkstategrandcouncil.com/uploads/1/3/1/4/131437538/bapemo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/9854/6082/files/51553074277.pdf
    • https://cdn.shopify.com/s/files/1/0432/0028/2783/files/16906574467.pdf
    • https://cdn.shopify.com/s/files/1/0433/3859/6511/files/xuzoragizifi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6030/5825/files/fawupaguvojo.pdf
    • https://cdn.shopify.com/s/files/1/0435/6875/8943/files/52807754263.pdf
    • https://cdn.shopify.com/s/files/1/0430/3824/5017/files/nonoduretemiren.pdf
    • https://cdn.shopify.com/s/files/1/0429/6320/6307/files/suvafez.pdf
    • https://cdn.shopify.com/s/files/1/0428/8489/0790/files/21940853615.pdf
    • https://cdn.shopify.com/s/files/1/0431/8904/3358/files/lixekolobolofibijabiveb.pdf
    • https://cdn.shopify.com/s/files/1/0432/9583/4280/files/46287132645.pdf
    • https://cdn.shopify.com/s/files/1/0429/5072/1699/files/10080250559.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_off00007c1d.bin
91152a252dde1d06d81458414f9f364041b4869754c5e80f11c07987e288dcb9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C1D 5444 bytes
font_01_sfnt_off00008e7f.bin
27e96b3a16f5f8c32ad48ecf6130528396048d9b89f6a73ed4a4bf1b59f546cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E7F 10232 bytes