Malicious PDF — malware analysis report

Static analysis result for SHA-256 57079826ecdccea3…

MALICIOUS

PDF

50.0 KB Created: 2020-08-25 19:06:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a442ddb3321c3a7fbd60d5a299cba48d SHA-1: db98686810c3adbfcddbce1959239853390643f5 SHA-256: 57079826ecdccea3e899d6ce4fa2a36e17501605d79ea321c27e02cda9c3b92c
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link redirects to a known malicious infrastructure at 'ttraff.club'. The document body, though heavily obfuscated, contains the text 'Stephen p robbins management 14th ed' and the malicious URL, suggesting a lure to download or view content related to this book. The ML classifier strongly flagged this PDF as malicious, and the presence of a redirector link confirms a malicious intent to lead the user to a harmful site.

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.club/pify?keyword=stephen+p+robbins+management+14th+ed
    • http://files.wedding-flowers-perth.com.au/uploads/1/3/1/0/131070702/7896770.pdf
    • http://zovanoje.negas.net/uploads/1/3/1/4/131407558/sezifamepuwo.pdf
    • https://cdn.shopify.com/s/files/1/0435/0682/7428/files/wujoxefa.pdf
    • https://cdn.shopify.com/s/files/1/0431/0034/0381/files/tower_chromatic_harmonica_lessons.pdf
    • https://cdn.shopify.com/s/files/1/0438/3526/1085/files/phonics_from_a_to_z_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/0107/7142/files/11317408432.pdf
    • https://cdn.shopify.com/s/files/1/0431/8344/0030/files/57902995088.pdf
    • https://cdn.shopify.com/s/files/1/0432/2584/1821/files/19565573552.pdf
    • https://cdn.shopify.com/s/files/1/0465/2636/5854/files/4658097549.pdf
    • https://cdn.shopify.com/s/files/1/0433/4256/1445/files/35603116559.pdf
    • https://cdn.shopify.com/s/files/1/0429/1434/9219/files/python_progress_bar_console.pdf
    • https://cdn.shopify.com/s/files/1/0438/4430/5056/files/case_files_neurology_3rd_edition.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_off0000846b.bin
7fd8d9f78cafc64abc3bdbde4cbafd3fae2c07464027ade8c556b318ea2ee1d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x846B 5724 bytes
font_01_sfnt_off000097a8.bin
9602d258e08ddf6e0ef50456fe6cffe0f1e717b6732b05167cea62da88c8644e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97A8 10628 bytes

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