Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa9979cd340d8112…

MALICIOUS

PDF

36.7 KB Created: 2020-08-20 06:53:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5335a7febe6287bb0f1454015b2ec738 SHA-1: 52b0fbc484846d6ed8ab87f604fd8910cb474f5f SHA-256: fa9979cd340d8112486ccdabd52aff53bb55cb9ab4c9b4a3cf3e57b73cc3f23b
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=cell+membrane+structure+and+function+worksheet+answer'. This indicates the document is designed to redirect users to malicious infrastructure. Additionally, the PDF exhibits characteristics of a link farm, embedding numerous external links, many of which are hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the lure. No scripts were extracted from this sample.

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=cell+membrane+structure+and+function+worksheet+answer
    • http://files.monfortestatesdacula.com/uploads/1/3/2/6/132681002/226bb98.pdf
    • http://files.asyouwishuk.com/uploads/1/3/1/4/131452878/rurivutagu_xupobusi_jizejepurewu.pdf
    • http://files.exercisewithtracy.co.uk/uploads/1/3/0/7/130776712/b8e631de8.pdf
    • http://files.ctknj.org/uploads/1/3/2/8/132815154/7764174.pdf
    • http://rapupuv.renfestjeweler.com/uploads/1/3/1/0/131071252/546916c78d1.pdf
    • https://cdn.shopify.com/s/files/1/0428/3406/7615/files/qigong_breathing_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0432/9409/7576/files/mac_os_high_sierra_hackintosh_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/3699/0885/files/1549439511.pdf
    • https://cdn.shopify.com/s/files/1/0434/6360/6429/files/craigslist_ie_jobs.pdf
    • https://cdn.shopify.com/s/files/1/0434/7992/4902/files/astragalo_vertical.pdf
    • https://cdn.shopify.com/s/files/1/0433/1021/9422/files/assises_fiscales_maroc_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/0071/6694/files/wiruzoxaroxalakejaxi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9961/1553/files/bodoni_bt_font.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_off0000503d.bin
355b76578d0c9abd6f2a725bd01a14478869794f3015e1d2afe92ee85990dc63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x503D 5460 bytes
font_01_sfnt_off000062a7.bin
ed9a3bea064709ad39a42c169e61e533f6f41f4f23bec93f26ffb7544aba430f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62A7 10288 bytes

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