Malicious PDF — malware analysis report

Static analysis result for SHA-256 a597c457cc11b7a0…

MALICIOUS

PDF

43.1 KB Created: 2020-08-16 13:27:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88544165ddb79a921f84705c9a346ffc SHA-1: fd2f7ed53d9400f6fe3a36971c0bf9d95770528a SHA-256: a597c457cc11b7a0f0f2827e94179e9e0288553ff0c53ff8c4b7185337ecc6af
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing for a PDF link farm. One of the primary links directs to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the redirector, suggesting an attempt to lure users to malicious infrastructure. The presence of numerous external PDF links, many hosted on Shopify, indicates a potential SEO manipulation or content distribution scheme.

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=weekly+calendar+template+printable
    • http://files.hollywoodpassionplay.com/uploads/1/3/1/4/131437318/ketitajiwuv.pdf
    • http://files.gonecruisincarclub.com/uploads/1/3/1/4/131437981/wufatafezivox.pdf
    • https://cdn.shopify.com/s/files/1/0429/5933/9674/files/gomadelatejes.pdf
    • https://cdn.shopify.com/s/files/1/0437/4704/9623/files/bugler_s_holiday_brass_quintet.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/lawujile.pdf
    • https://cdn.shopify.com/s/files/1/0434/8500/3926/files/surgical_cases_for_medical_students.pdf
    • https://cdn.shopify.com/s/files/1/0435/2193/3466/files/26906795502.pdf
    • https://cdn.shopify.com/s/files/1/0434/3729/3718/files/46624515467.pdf
    • https://cdn.shopify.com/s/files/1/0430/9054/2753/files/rukov.pdf
    • https://cdn.shopify.com/s/files/1/0433/9279/4774/files/15060419352.pdf
    • https://cdn.shopify.com/s/files/1/0427/5961/8716/files/2020_tamil_calendar_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/3111/7467/files/74097772301.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_off00006ae6.bin
73d7ef885ed197643aef941c5210b5fa3959ab6c4e7f8a9b76d416b85d67d8cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE6 5360 bytes
font_01_sfnt_off00007d16.bin
25fd694b0c0c7f2ec36fe71dbb521d184f2a154a5e36f1817aff78def5c43789		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D16 10120 bytes

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