Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf2747172d1c267d…

MALICIOUS

PDF

41.0 KB Created: 2020-08-28 16:21:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a207f11f398e8219def6bcf1d053dd93 SHA-1: 697312cae589c77d303fa72c9edee1099a54e37b SHA-256: bf2747172d1c267daf0fd3a1679ef83a4e30a954da5d47ab6bff87b2113b0bb8
150 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the critical heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The primary malicious URL is https://ttraff.cc/pify?keyword=tedarik+zinciri+y%25C3%25B6netimi+ve+lojistik. The document body, though partially corrupted, also contains this URL and other links to Shopify-hosted PDFs, suggesting a lure to disguise the malicious redirection. 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=tedarik+zinciri+y%25C3%25B6netimi+ve+lojistik
    • http://files.covrha.com/uploads/1/3/1/6/131637814/solof.pdf
    • http://files.swhiteyart.com/uploads/1/3/0/8/130873918/2741862.pdf
    • http://files.stfrancispaumavalley.org/uploads/1/3/0/7/130775465/8066446.pdf
    • https://cdn.shopify.com/s/files/1/0435/5319/4133/files/business_communication_notes_for_bba_1st_sem.pdf
    • https://cdn.shopify.com/s/files/1/0450/8853/8776/files/makalah_abortus_lengkap.pdf
    • https://cdn.shopify.com/s/files/1/0434/0560/7070/files/16752888446.pdf
    • https://cdn.shopify.com/s/files/1/0432/4871/3896/files/69830092559.pdf
    • https://cdn.shopify.com/s/files/1/0434/4492/8674/files/38132462525.pdf
    • https://cdn.shopify.com/s/files/1/0435/2940/4567/files/jakazakoloborutoxenewa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80084587067.pdf
    • https://cdn.shopify.com/s/files/1/0438/8156/2280/files/jp_morgan_weekly_stock_market_report.pdf
    • https://cdn.shopify.com/s/files/1/0432/2882/3719/files/clothes_adobe_illustrator_templates_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/6405/7238/files/67389144830.pdf
    • https://cdn.shopify.com/s/files/1/0431/4831/2730/files/18431170337.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_off00005f23.bin
a553eec6f3d42b50e68e1c368a01eadedccaeed917442438a7f14e732f33e673		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F23 5524 bytes
font_01_sfnt_off000071b1.bin
3114efeb49c2fb2948d6d0d6e7f76815810cccc6367c467f95f53ef8437954ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71B1 11360 bytes

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