Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4f66785a04c25fa…

MALICIOUS

PDF

45.3 KB Created: 2020-08-09 04:58:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9951b73553e7defe1fbb787d84dfd3ea SHA-1: c469d001a5c6f1d81e74111754905a841b4b1cb6 SHA-256: d4f66785a04c25fa66a2817f264bcf3d18bc24cf5da27ab7a7efccf6ed9f3d80
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a high density of external links, many of which point to a redirector service. The primary malicious link, 'https://ttraff.cc/pify?keyword=amazing+grace+my+chains+are+gone+piano+solo+pdf', is designed to appear as a benign document but ultimately leads to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/pify?keyword=amazing+grace+my+chains+are+gone+piano+solo+pdf
    • http://files.thecottagebaker.net/uploads/1/3/1/6/131637016/jozofalefavom_gakoxabipimaku_wonorolisud.pdf
    • http://files.fortwrightfire.com/uploads/1/3/2/6/132681556/0f4d6784766.pdf
    • http://files.dongarbutt.com/uploads/1/3/0/9/130969054/fatimixefovepuk_jimapoto_pevoboxupubere_voruzo.pdf
    • http://kevun.mcncgop.com/uploads/1/3/2/6/132695306/f57f98b10eb.pdf
    • https://cdn.shopify.com/s/files/1/0435/8150/5695/files/mengubah_file_ke_word_online.pdf
    • https://cdn.shopify.com/s/files/1/0429/1565/9942/files/construction_project_business_plan.pdf
    • https://cdn.shopify.com/s/files/1/0431/7449/4369/files/business_in_kenya.pdf
    • https://cdn.shopify.com/s/files/1/0431/5666/8573/files/include_latex.pdf
    • https://cdn.shopify.com/s/files/1/0429/3391/1705/files/vofenod.pdf
    • https://cdn.shopify.com/s/files/1/0433/7631/2471/files/sukudaresuxenibajakulije.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6657/files/43975236946.pdf
    • https://cdn.shopify.com/s/files/1/0431/1475/8293/files/86064905256.pdf
    • https://cdn.shopify.com/s/files/1/0433/6133/7494/files/tuxunixekenuxatireb.pdf
    • https://cdn.shopify.com/s/files/1/0431/3432/0794/files/luvabapimebafaf.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_off0000727c.bin
e403a04151fdab9e0f91cefd165a8513595761add11ca5f2645ab60ccc0a7665		 pdf-font-stream PDF embedded font (sfnt) at offset 0x727C 5708 bytes
font_01_sfnt_off000085cf.bin
8b0a6b1c87aa877a707c64ea849b32806f2a3fd42ea9a74eae2c5248dffcfd82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85CF 9992 bytes

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