Malicious PDF — malware analysis report

Static analysis result for SHA-256 386a73bb294e5c7c…

MALICIOUS

PDF

38.0 KB Created: 2020-08-23 18:18:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66585fdbffd996db084179a85f624ab6 SHA-1: 8d2d1ea12c926fcf843b884560fff545008d7328 SHA-256: 386a73bb294e5c7cd8d05ea2f4c8963830af960a230b79a9cc719aa45cd1ce88
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.ru/pify?keyword=head+lice+fact+sheet+in+spanish, which is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to malicious content. The presence of numerous Shopify-hosted PDF links, while many are benign, contributes to a link farm tactic.

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=head+lice+fact+sheet+in+spanish
    • http://files.emorylanedesigns.com/uploads/1/3/1/6/131606060/fe78210dad9c7.pdf
    • https://cdn.shopify.com/s/files/1/0446/6167/0051/files/ap_state_reorganisation_act_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/3426/4231/files/49443971347.pdf
    • https://cdn.shopify.com/s/files/1/0434/1720/6949/files/38724803230.pdf
    • https://cdn.shopify.com/s/files/1/0432/4638/7367/files/attendance_sheet_in_excel_format.pdf
    • https://cdn.shopify.com/s/files/1/0437/9167/9648/files/linux_convert_to_jpg.pdf
    • https://cdn.shopify.com/s/files/1/0437/0884/2152/files/bokowoxawakowofunija.pdf
    • https://cdn.shopify.com/s/files/1/0437/7369/0017/files/makalah_sumber_ajaran_agama_islam.pdf
    • https://cdn.shopify.com/s/files/1/0433/7372/3800/files/calories_in_lasagna_pasta_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0431/6961/1935/files/koreader_kobo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/sir_arthur_conan_doyle_books.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_off000056d0.bin
d3a7c8247c6e5046c6fec1ede5b1802c7d6988840338d4d8fc31ef609912ef20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56D0 5108 bytes
font_01_sfnt_off00006828.bin
92702480bd01324393b61e3a4b213b6af81ddc19bb4427d35c8529274b0d43f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6828 10296 bytes

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