Malicious PDF — malware analysis report

Static analysis result for SHA-256 6015a2a80f7af1be…

MALICIOUS

PDF

33.6 KB Created: 2020-11-08 03:05:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7cda2ec777e8d37c1453b1a12b6e4ae6 SHA-1: e94a557dcd5045de142dee1456e0e3e8bf1a7df9 SHA-256: 6015a2a80f7af1bed50a2c8ebf7b1b393f2a382c8f8a9ed3e13fe9c7cc0fe990
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links to other PDFs, a technique often used for SEO poisoning or to obscure malicious redirects. One of the embedded URLs, 'https://ggtraff.ru/aws?keyword=juke+cell+phone+pic', is flagged as a malicious redirector. The presence of a link farm and a malicious redirector suggests an attempt to lead users to malicious content, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://ggtraff.ru/aws?keyword=juke+cell+phone+pic
    • https://cdn-cms.f-static.net/uploads/4379498/normal_5f8e844511dec.pdf
    • https://cdn-cms.f-static.net/uploads/4374696/normal_5f949f72243b6.pdf
    • https://cdn-cms.f-static.net/uploads/4379720/normal_5f920ee4a5069.pdf
    • https://cdn-cms.f-static.net/uploads/4380871/normal_5f9706930ebd0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e742d016-e790-4cb8-85c6-b5b287e11a23/mojegumolikoxovavaguxemu.pdf
    • https://uploads.strikinglycdn.com/files/92fb70b3-d14e-483c-99b3-62f7688be690/20633960202.pdf
    • https://uploads.strikinglycdn.com/files/c340dac2-e88d-479f-9d0e-c1186ea5c721/5490377720.pdf
    • https://pejijonarek.files.wordpress.com/2020/11/does_dimethyl_ether_form_hydrogen_bonding.pdf
    • https://uploads.strikinglycdn.com/files/baa43c35-6461-4706-bdb9-b80c98d63331/75308970367.pdf
    • https://uploads.strikinglycdn.com/files/c01da1b2-f829-4d9b-a8ba-2d86cfa7cdbd/wolipexalove.pdf
    • https://mibawegusan.files.wordpress.com/2020/11/libros_de_guillermo_maldonado.pdf
    • https://uploads.strikinglycdn.com/files/fe43caa6-2252-41a9-b199-bc161e126a56/xxx.pdf
    • https://dudabogem.files.wordpress.com/2020/11/omnicell_xt_user_manual.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ba2.bin
bb9c7105e668f78d5c228f801741c141a8d83a43594f6c6d63e5850bbcc846fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BA2 4588 bytes

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