Malicious PDF — malware analysis report

Static analysis result for SHA-256 742b868a9ce1c985…

MALICIOUS

PDF

42.5 KB Created: 2020-08-31 02:20:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4f307b2eb1a0edcf885773498a6d87c SHA-1: 03f74ee67bbbfff832905f470cfac5b7fdce7b9a SHA-256: 742b868a9ce1c9852cd3f28d47227a26fd51345b841efa75254f16aaf0de8e24
154 Risk Score

Malware Insights

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

The PDF file contains embedded links, one of which, https://ttraff.com/wix?keyword=weblogic+server+for+oracle+forms+11g, is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to trick users into visiting it. The presence of numerous other PDF links further indicates a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious.

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=weblogic+server+for+oracle+forms+11g
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/f515ca_76b0faeca560422181e91006c8079196.pdf
    • https://static.usrfiles.com/ugd/dfb5f8_30076ad315644705afe2eec6dcefe43b.pdf
    • https://static.usrfiles.com/ugd/01e791_cfa94739d2c94306b2758460d7de8f84.pdf
    • https://cdn.shopify.com/s/files/1/0431/4991/8374/files/54778510604.pdf
    • https://cdn.shopify.com/s/files/1/0435/7311/7096/files/32554948177.pdf
    • https://cdn.shopify.com/s/files/1/0433/5003/2549/files/auralux_mod_apk.pdf
    • https://cdn.shopify.com/s/files/1/0465/0896/6046/files/huracan_performante_vs_aventador_s_drag_race.pdf
    • https://cdn.shopify.com/s/files/1/0428/1656/9500/files/kofofa.pdf
    • https://cdn.shopify.com/s/files/1/0430/6337/8081/files/cintiq_22hd_touch_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/8217/6920/files/bugejotilaxipodalode.pdf
    • https://cdn.shopify.com/s/files/1/0454/9050/3832/files/cv_abdoulaye_wade.pdf
    • https://cdn.shopify.com/s/files/1/0430/0396/9689/files/48020687131.pdf
    • https://static.usrfiles.com/ugd/b8c837_c4ad0c5470d84547a3b459b64627caf4.pdf
    • https://static.usrfiles.com/ugd/b8c837_832aecef188b4b538cd4dcace800634b.pdf
    • https://static.usrfiles.com/ugd/87fdc7_c70e117376b148d3bd28f86bf3842896.pdf
    • https://static.usrfiles.com/ugd/b8c837_475ea5f403834e1c956264d8c682346e.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_off0000679b.bin
fd86ffb1368ef3e8b939cf51952848aa263439426779549b25f3241b90ba9bf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x679B 5464 bytes
font_01_sfnt_off00007a36.bin
d827610b6f73f4c53cef301f34d2158f969b0ec50c318a269f8c66e879a6bfa8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A36 10208 bytes

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