Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4bfe92de5ab24c9…

MALICIOUS

PDF

44.7 KB Created: 2020-08-05 02:02:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d5c67843197e1f2c8c46a273019794d SHA-1: 45dc689c26825dfc12ca0ddd8ff77cea0f7a0f2b SHA-256: d4bfe92de5ab24c9dc814dc30f0fc34fa36cf0dae0ff4118e2d986c750ecefa5
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL. This suggests the PDF is designed to act as a link farm, ultimately leading the user to the malicious ttraff.com domain.

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.com/pify?keyword=arteritis+de+takayasu+pediatria+pdf
    • http://files.bellaandpolly.com/uploads/1/3/1/3/131380504/tumuwuvamimiv.pdf
    • http://files.hotspringswinery.com/uploads/1/3/0/9/130969939/negurawumidurajap.pdf
    • http://files.logantstark.com/uploads/1/3/2/6/132681969/585a8c0.pdf
    • https://cdn.shopify.com/s/files/1/0430/6662/2105/files/detidutiwagunifukogizeva.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23535065851.pdf
    • https://cdn.shopify.com/s/files/1/0435/4870/4917/files/58834205315.pdf
    • https://cdn.shopify.com/s/files/1/0434/9440/8354/files/selling_skills_for_medical_rep.pdf
    • https://cdn.shopify.com/s/files/1/0429/8624/2209/files/29189725536.pdf
    • https://cdn.shopify.com/s/files/1/0449/6372/5480/files/black_demon_slayer_task_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0434/6245/9544/files/15115408112.pdf
    • https://cdn.shopify.com/s/files/1/0428/3521/4503/files/b._ed_syllabus_tnteu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/birizakidunupujudexi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1126/0062/files/xagepufavelupedeniti.pdf
    • https://cdn.shopify.com/s/files/1/0432/5595/5613/files/gesejusut.pdf
    • https://cdn.shopify.com/s/files/1/0429/5426/0643/files/36029535406.pdf
    • https://cdn.shopify.com/s/files/1/0433/0081/4998/files/31251468375.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sigejorivuzogekos.pdf
    • https://cdn.shopify.com/s/files/1/0432/7633/7318/files/gogagowuxenopejuzejunet.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_off00007085.bin
c2cdb439dc50f89e4a543262554fc072c72c7d7df153bf914d5d8fbf8ca3e8d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7085 5160 bytes
font_01_sfnt_off00008231.bin
93d16098b39e1ebea0169b9398b1b444a10ce05eb9234b1506f9540b8384e475		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8231 10460 bytes

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