Malicious PDF — malware analysis report

Static analysis result for SHA-256 45ad774a1742492c…

MALICIOUS

PDF

40.9 KB Created: 2020-08-01 10:15:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 664cef0a7ca66bffe7aa3fba6352d892 SHA-1: e151ef2730e6a73cce3210de38402858c67ed719 SHA-256: 45ad774a1742492c731dfab277f15982d42f4802fe339ec4a8ad5c13cca0e692
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=navien+npe+240a+manual'. This suggests the document is part of a link farm or SEO poisoning campaign designed to direct users to malicious infrastructure. 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/pify?keyword=navien+npe+240a+manual
    • http://files.highgearcoaching.com/uploads/1/3/1/4/131453818/4490914.pdf
    • http://files.nccrabbingandshrimping.com/uploads/1/3/0/7/130776008/4077c03bc876a.pdf
    • http://files.agorapublications.net/uploads/1/3/2/6/132682570/4da5af8.pdf
    • http://files.healthyconceptsmb.org/uploads/1/3/1/6/131606668/1171341.pdf
    • http://files.colindecio.com/uploads/1/3/0/7/130775001/363155.pdf
    • https://cdn.shopify.com/s/files/1/0432/5461/2123/files/noposugopowomeb.pdf
    • https://cdn.shopify.com/s/files/1/0434/7274/8710/files/20258657298.pdf
    • https://cdn.shopify.com/s/files/1/0431/6404/1373/files/kegipigopoboxusebetoje.pdf
    • https://cdn.shopify.com/s/files/1/0435/2881/4746/files/25592290030.pdf
    • https://cdn.shopify.com/s/files/1/0441/1306/8184/files/moxovofiv.pdf
    • https://cdn.shopify.com/s/files/1/0436/9671/7992/files/rizedabixasovomekimuju.pdf
    • https://cdn.shopify.com/s/files/1/0438/0576/9888/files/5383417525.pdf
    • https://cdn.shopify.com/s/files/1/0432/3124/8542/files/66571426185.pdf
    • https://cdn.shopify.com/s/files/1/0429/4259/5239/files/82053167973.pdf
    • https://cdn.shopify.com/s/files/1/0432/1234/1416/files/nebolumowen.pdf
    • https://cdn.shopify.com/s/files/1/0432/2492/4319/files/19434564416.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_off0000614a.bin
0d161cb30866ae9b6ca34596163805cf05e3d9dfdfea22d2f9ef8fe49399e4ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x614A 5084 bytes
font_01_sfnt_off0000729f.bin
4d885f359d987aaf2ee4d8abfe592f644caa343edf72d266111f70756be4d815		 pdf-font-stream PDF embedded font (sfnt) at offset 0x729F 10756 bytes

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