Malicious PDF — malware analysis report

Static analysis result for SHA-256 91b0eacb77a453dd…

MALICIOUS

PDF

44.4 KB Created: 2020-07-19 03:05:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ec4fc44b817e03d64fa74992ec7b6a2 SHA-1: 9b35fd2cd2c01c384a12fe5c6c62eea4af3ed772 SHA-256: 91b0eacb77a453dd1aa8b6829c46899466b8ecfe9c2767751e582c0dc48e2d44
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 external links, identified by the PDF_SEO_LINK_FARM heuristic. One of these links points to a known malicious redirector. The document body is heavily obfuscated and appears to be metadata rather than user-readable content. The primary attack pattern involves redirecting users to potentially malicious or SEO-manipulated external sites.

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.cc/wb?keyword=vacuum%20oven%20memmert%20pdf
    • http://files.stopdvnow.com/uploads/1/3/1/4/131437210/7392711.pdf
    • http://files.meridianbodycare.com/uploads/1/3/1/8/131857193/6976761.pdf
    • http://files.provodeckandfence.com/uploads/1/3/0/7/130739510/ea8832b133c8.pdf
    • http://files.cjcsmembers.com/uploads/1/3/1/0/131070378/14d7b3b1bb6.pdf
    • http://files.hsvb.org/uploads/1/3/0/7/130739918/zodafu-fobimate.pdf
    • http://files.karleneblandfineart.com/uploads/1/3/0/7/130776451/jekewalivumetek_benowapedaxo.pdf
    • http://files.noaries.com/uploads/1/3/0/8/130874110/dofagunef.pdf
    • http://files.mililaniphysicaltherapy.com/uploads/1/3/2/7/132740352/xafiwejeloz.pdf
    • https://bolazeboju.files.wordpress.com/2020/06/50313065642.pdf
    • https://sabuzulili.files.wordpress.com/2020/07/44549811208.pdf
    • https://zabalime270743903.files.wordpress.com/2020/07/42459844941.pdf
    • https://dedovirap.files.wordpress.com/2020/06/3642854089.pdf
    • https://cdn.shopify.com/s/files/1/0431/5650/4744/files/1273069039.pdf
    • https://cdn.shopify.com/s/files/1/0431/2681/6932/files/17478866281.pdf
    • https://cdn.shopify.com/s/files/1/0436/5965/7374/files/14120228263.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31052941417.pdf
    • https://cdn.shopify.com/s/files/1/0433/3810/5000/files/pobonexopupagaji.pdf
    • https://cdn.shopify.com/s/files/1/0433/4495/3509/files/66201730724.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_off00007218.bin
af23844c1a224d82bf95abf928e431a017536c070deaa6950bd335a08d3e36be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7218 4952 bytes
font_01_sfnt_off000082d1.bin
a6167390e3bee7bc3b9b0583549d33e1048c67b8aac548483561f99be09f77a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82D1 9796 bytes

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