Malicious PDF — malware analysis report

Static analysis result for SHA-256 78fa0c385c6ed4f4…

MALICIOUS

PDF

45.4 KB Created: 2020-08-04 07:25:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a71ee5d30a558196d510c1ef5fb7cbe8 SHA-1: 60af84213a09ac3b3d11849861d78364ad196a1b SHA-256: 78fa0c385c6ed4f4f0a2b23a0124864b3b6bc8a9dacc2935d2997115e3d652c2
150 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, contains text suggesting a lure for 'Prince2 2020 pdf download'. The PDF_SEO_LINK_FARM heuristic indicates the presence of numerous external links, likely part of a link farm to improve search engine ranking for malicious content. The ML_NYX_PDF_MALICIOUS 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.ru/pify?keyword=prince2+2020+pdf+download
    • http://files.kawarthafootclinic.com/uploads/1/3/2/8/132814166/7599963.pdf
    • http://files.dhbeautybar.com/uploads/1/3/1/3/131397971/ridafifog-fufifovetane-zuvidobeles.pdf
    • http://xavavob.megjade.com/uploads/1/3/0/8/130814397/36b7b5708937b2.pdf
    • http://files.italianstringsacademy.com/uploads/1/3/0/8/130874358/fekemazo.pdf
    • http://files.bgreenyoga.com/uploads/1/3/1/8/131856907/zidagodubobadagud.pdf
    • https://cdn.shopify.com/s/files/1/0433/7270/7990/files/9625537002.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/58863311498.pdf
    • https://cdn.shopify.com/s/files/1/0431/3120/7837/files/bukimufizonolo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5335/0040/files/sefumibekiletekotiwijibi.pdf
    • https://cdn.shopify.com/s/files/1/0430/4361/8969/files/kujafegegup.pdf
    • https://cdn.shopify.com/s/files/1/0430/4168/5665/files/2608314516.pdf
    • https://cdn.shopify.com/s/files/1/0438/0445/9168/files/rasimilomunilobugiwujetak.pdf
    • https://cdn.shopify.com/s/files/1/0430/2707/1130/files/6435994749.pdf
    • https://cdn.shopify.com/s/files/1/0434/7114/3078/files/jukotagiragivegurebozibo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/telisupuf.pdf
    • https://cdn.shopify.com/s/files/1/0434/1992/6679/files/andhra_bank_atm_card_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0427/6230/5702/files/zinizet.pdf
    • https://cdn.shopify.com/s/files/1/0433/1352/8987/files/59563442747.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_off00006850.bin
e5c2a6042c83be5cfd2a69ee34d8d8a0be08db04202eed791989e9978f00a787
pdf-font-stream PDF embedded font (sfnt) at offset 0x6850 5340 bytes
font_01_sfnt_off00007a9d.bin
5d2d9481e8381221135e14744132ecfa71e57a759f5938cdeafd24f3d9600716
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A9D 14732 bytes