Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aa6e59eeea52f56…

MALICIOUS

PDF

39.8 KB Created: 2020-08-31 09:10:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 188bdbebbc9fa7baf752eaa9c85dbcef SHA-1: c0e9baafbb714a1ea4b27deb175da434c539873e SHA-256: 5aa6e59eeea52f56683d85525a3dbc8dee324233d896e6121e26ef049fe69a79
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to external PDF documents, which is indicative of a link farm. One of the primary links, https://ttraff.cc/wix?keyword=gazl%25C4%25B1+ocak+60cm, is flagged as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to lure users to malicious infrastructure, potentially as part of a phishing or SEO manipulation campaign.

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.cc/wix?keyword=gazl%25C4%25B1+ocak+60cm
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/33ab24_d9620c78b70745f7ab9fdb5f142104ce.pdf
    • https://static.usrfiles.com/ugd/b8c837_9103ccc0c81647c68040e4b2ae5c9f27.pdf
    • https://static.usrfiles.com/ugd/b8c837_8b2e0677ffdc434289e2fae52a9c2527.pdf
    • https://cdn.shopify.com/s/files/1/0457/0654/3260/files/torujodulisi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7803/3313/files/41881928180.pdf
    • https://static.usrfiles.com/ugd/b8c837_dcbced4a0dc24b97ac1b3bec8faca0d8.pdf
    • https://static.usrfiles.com/ugd/b8c837_ee60ffe794b9420398a5a1d2f0fbddd4.pdf
    • https://static.usrfiles.com/ugd/a838c0_6520ecb3c00f486a84b35ff4d4225316.pdf
    • https://static.usrfiles.com/ugd/111c46_3cfadd93b0d848e2a1c4af94bb688085.pdf
    • https://static.usrfiles.com/ugd/0bcf16_fa3da9ae2577466488764d25048d77e9.pdf
    • https://static.usrfiles.com/ugd/6f58fb_d69c5d188db14916b425101bf29c1c10.pdf
    • https://static.usrfiles.com/ugd/b8c837_06db17e6207a4202b155e66128dde9ea.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d42.bin
d06e9bdd42fd2c7ef0dab6d60aa99e0bdeaf31bb0c8e6de587dbc5850f2e1381
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D42 5144 bytes
font_01_sfnt_off00006ebc.bin
6b5380c9ab0697ad045b885b12f1b774473f63fd7317925a3f1d3e1488e7838f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EBC 10868 bytes