Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aab2ed62fa80b4a…

MALICIOUS

PDF

49.3 KB Created: 2020-09-01 12:43:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f51eed5c2a8fc8e7f7ea60f172467f6c SHA-1: 08bb92e8b797087423608122c7b7151388f148f8 SHA-256: 5aab2ed62fa80b4a0ff2fad85a412e2773d5b9cac4ab84245758f697363e693d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, with one specifically pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, includes the same URL, suggesting an attempt to trick the user into clicking it. The presence of numerous other PDF links further indicates a link farm or redirection strategy. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wix?keyword=golden+state+warriors+injury+report+2018
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/ce5d00_df5764af4ad84215a5228db7305590fa.pdf
    • https://static.usrfiles.com/ugd/96bf9d_4110eaec59944974b0c76144ade64809.pdf
    • https://static.usrfiles.com/ugd/daca0d_8fc5ee2c150a4acdbc627cb30447c711.pdf
    • https://static.usrfiles.com/ugd/95089d_3daa1b1a618b4b30b46a6ff4defb1ad4.pdf
    • https://cdn.shopify.com/s/files/1/0435/6653/0728/files/14315414432.pdf
    • https://cdn.shopify.com/s/files/1/0459/6973/5847/files/zajopolurofevulaleromedo.pdf
    • https://cdn.shopify.com/s/files/1/0440/8619/8424/files/9072125494.pdf
    • https://static.usrfiles.com/ugd/b8c837_8e05623e3ceb464f836ccff069055db1.pdf
    • https://static.usrfiles.com/ugd/f0f215_9f345707b7764715b247fd154ccff2bd.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067fe.bin
afa0e8d8c6e66e586003d2272286198e64cd97d6f9e5c0ccf63b7c8ad8976105
pdf-font-stream PDF embedded font (sfnt) at offset 0x67FE 5656 bytes
font_01_sfnt_off00007b6d.bin
2544b9b00de938152f0541ea832edcf98e29346175ad12ca6456378725d4a8b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B6D 15248 bytes
font_02_sfnt_off0000aa73.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xAA73 4324 bytes