Malicious PDF — malware analysis report

Static analysis result for SHA-256 9da7f558627cf437…

MALICIOUS

PDF

44.3 KB Created: 2020-08-30 10:29:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6aa6fa2644be2efd6c3df3f217318dec SHA-1: e97b091b26e850b8b65334fea9d22529d0269b4e SHA-256: 9da7f558627cf43703a953eab5ed445c1760b4bef9413319fe4c73dc907d87e2
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to its inclusion of a link farm and a redirector link. The primary URL, https://ttraff.ru/wix?keyword=estadistica+para+ingenieros+miller+p, points to known malicious infrastructure. The document also contains numerous links to PDFs hosted on Shopify, suggesting a coordinated effort to distribute content or lure users. No scripts were extracted, and the document body was heavily obfuscated, but the presence of the malicious redirector is a strong indicator of malicious intent.

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=estadistica+para+ingenieros+miller+p
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dojedeteremedadedarovir.pdf
    • https://cdn.shopify.com/s/files/1/0440/9635/6504/files/87028902046.pdf
    • https://cdn.shopify.com/s/files/1/0431/0102/8503/files/paruxu.pdf
    • https://static.usrfiles.com/ugd/ea5d7b_7d74c6ce0c344e3eb002117032579d82.pdf
    • https://cdn.shopify.com/s/files/1/0430/6065/8330/files/88258140431.pdf
    • https://cdn.shopify.com/s/files/1/0435/1367/5928/files/biquad_filter_design.pdf
    • https://cdn.shopify.com/s/files/1/0432/4841/8973/files/bowij.pdf
    • https://cdn.shopify.com/s/files/1/0429/4760/8730/files/31954952235.pdf
    • https://cdn.shopify.com/s/files/1/0428/8672/5799/files/reading_skills.pdf
    • https://cdn.shopify.com/s/files/1/0433/3862/9270/files/18978539586.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7741/files/arm_stretches.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_off00006996.bin
66b0217aef24726ba62c66a996674e2aa4d21d5ae8d1bc2f9632668bb1057bd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6996 5348 bytes
font_01_sfnt_off00007baa.bin
0aef7e7e8200469e21573eb02a310e613611e9825a5fe09ea5eda531d89274a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BAA 12180 bytes

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