Malicious PDF — malware analysis report

Static analysis result for SHA-256 c706bfc439efcf73…

MALICIOUS

PDF

41.0 KB Created: 2020-08-08 06:30:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d271f02088c72307c381c772f7fac31 SHA-1: e10b06b7289b29bd28fa355eec5d818d329e98d0 SHA-256: c706bfc439efcf7391077eb77d859753869568f6fd36dd9eb9ab911f45be568c
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a document title ('Bmjv vorsorgevollmacht pdf') and references the wkhtmltopdf tool, suggesting a potential lure. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further malicious content.

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.ru/pify?keyword=bmjv+vorsorgevollmacht+pdf
    • http://files.girlsincjax.org/uploads/1/3/0/7/130739678/bovosa.pdf
    • http://disofa.sandriver.org/uploads/1/3/0/7/130775350/kapobotemana.pdf
    • http://files.hawaiiislandgoatdairy.com/uploads/1/3/2/6/132695493/pojaz-fomipajo-raxoxanuk.pdf
    • http://files.jasonkinneyband.com/uploads/1/3/0/7/130739459/2785351.pdf
    • http://files.riverfrontplaza.net/uploads/1/3/0/7/130739275/6010837.pdf
    • https://cdn.shopify.com/s/files/1/0431/6237/0210/files/aparatos_del_cuerpo_humano.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/komezozu.pdf
    • https://cdn.shopify.com/s/files/1/0437/4023/3879/files/kaganapan_ng_pandiwa_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0431/3861/3415/files/bapetilowopuru.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/lenabimiviwimu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3332/9817/files/13209280164.pdf
    • https://cdn.shopify.com/s/files/1/0429/5586/6263/files/64342786826.pdf
    • https://cdn.shopify.com/s/files/1/0433/0923/6374/files/wafarazasijositavenejosig.pdf
    • https://cdn.shopify.com/s/files/1/0438/0770/3201/files/3187401327.pdf
    • https://cdn.shopify.com/s/files/1/0435/6987/3054/files/business_proposal_sample_powerpoint_presentation.pdf
    • https://cdn.shopify.com/s/files/1/0433/2745/5382/files/4176181495.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_off00005e16.bin
70e7a4351627defda7305ea77ed3be3e340b6a54f756db5b816c39c491a2daf6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E16 5752 bytes
font_01_sfnt_off0000718e.bin
8443d1f470ec9f757455c868348b68daed07fc2a4843af85f50541c47e0317fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x718E 11024 bytes

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