Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1e2855fd4d03b2c…

MALICIOUS

PDF

46.9 KB Created: 2020-08-30 11:29:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7593713d845f9da9e7618d3fb2f63259 SHA-1: b96a0b88b0d5dbf196296810d56e9b8377e89a33 SHA-256: d1e2855fd4d03b2cff4cbddc896bcd48054e429259467c46720909d76ca69431
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/wix?keyword=%25C3%25A7ekim+senaryosu+word'. Additionally, another critical heuristic indicates a PDF link farm, suggesting an attempt to manipulate search engine results. The document body contains obfuscated text and embedded URLs, further supporting the malicious intent. No scripts were extracted from this sample.

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/wix?keyword=%25C3%25A7ekim+senaryosu+word
    • https://cdn.shopify.com/s/files/1/0431/0709/0581/files/53045149913.pdf
    • https://cdn.shopify.com/s/files/1/0443/4988/2524/files/diagnostic_microbiology_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/0916/2907/files/83201301778.pdf
    • https://cdn.shopify.com/s/files/1/0428/0349/5071/files/98041762340.pdf
    • https://cdn.shopify.com/s/files/1/0432/3157/6226/files/canoe_software.pdf
    • https://cdn.shopify.com/s/files/1/0437/2329/2822/files/penyakit_orchitis.pdf
    • https://cdn.shopify.com/s/files/1/0432/4143/9400/files/64729615633.pdf
    • https://cdn.shopify.com/s/files/1/0434/7605/8274/files/zavetuxezumopujabilogavi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/mathematical_logical_reasoning_questions_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/3251/8549/files/tobapuwujugesalexapof.pdf
    • https://cdn.shopify.com/s/files/1/0430/0007/0307/files/xokibepiwulezufuduta.pdf
    • https://cdn.shopify.com/s/files/1/0429/2375/3635/files/77003830278.pdf
    • https://cdn.shopify.com/s/files/1/0452/5673/6928/files/32092017945.pdf
    • https://cdn.shopify.com/s/files/1/0433/9476/0862/files/list_of_primes.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/
    • https://cdn.shopify.com/s/f

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076da.bin
cb965f3b6af2ebbf6e1ce7def27c26cbb5ffd02b246a78cc80cb08fe287e276b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76DA 5292 bytes
font_01_sfnt_off0000888e.bin
61c992e07ab8446bd539fedf2d9bd6ee6556ac40c8c6abe4f86e71d01f9d8f13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x888E 11676 bytes

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