Malicious PDF — malware analysis report

Static analysis result for SHA-256 94bb7dd9320f1237…

MALICIOUS

PDF

45.9 KB Created: 2020-08-30 11:39:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a09943977fc719dfdad3102a7326723 SHA-1: 0822b916a2431baa05a860ee4acc81b7e8d86600 SHA-256: 94bb7dd9320f1237745078e84ad48c5238098357f703eba0d0fee2e2b1499dff
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link that redirects to a known malicious domain, disguised as a 'beaver personality test'. This heuristic, combined with the ML classifier's high confidence, indicates a phishing attempt. The document also contains a large number of external PDF links, likely for SEO manipulation to increase visibility.

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=beaver+personality+test
    • https://static.usrfiles.com/ugd/b8c837_8df74262b403471d8adc9018a728f5bf.pdf
    • https://static.usrfiles.com/ugd/b8c837_878ff843bf164f8ea95cb9039d221256.pdf
    • https://static.usrfiles.com/ugd/07625c_bfc3590ff5f9489682399bd2f130929c.pdf
    • https://static.usrfiles.com/ugd/b8c837_324eabb27b67418593593c50426704ce.pdf
    • https://static.usrfiles.com/ugd/be19e1_9388be7351014ef99350cb448e3686bf.pdf
    • https://static.usrfiles.com/ugd/9e14ca_19e4f8cbcf4c48338b90836557bfe545.pdf
    • https://static.usrfiles.com/ugd/b8c837_b163dd7a12994e479ffc31d4ffef78a0.pdf
    • https://static.usrfiles.com/ugd/ea2f88_59e3f7cc71f84f39974a6964c6dee76e.pdf
    • https://cdn.shopify.com/s/files/1/0430/9486/8122/files/jadipinobexadag.pdf
    • https://cdn.shopify.com/s/files/1/0437/6608/7832/files/90026926067.pdf
    • https://cdn.shopify.com/s/files/1/0432/2010/7424/files/videvizerixotajijero.pdf
    • https://cdn.shopify.com/s/files/1/0434/4581/3413/files/bachelor_party_video_songs.pdf
    • https://static.usrfiles.com/ugd/9e53d4_1abbfac522f5435bb023b85e39e5cac0.pdf
    • https://static.usrfiles.com/ugd/b8c837_2144100e9be34a09ba9a82ea531e3fca.pdf
    • https://static.usrfiles.com/ugd/b8c837_c3f3873bd5d94985827907ad64daa3e0.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000666a.bin
7d7fd902fa208b935c462f492b87695ba363d397b3dc6653160b17cacee42777
pdf-font-stream PDF embedded font (sfnt) at offset 0x666A 4692 bytes
font_01_sfnt_off000076fa.bin
7b0dfc6f06289bf9d50ae3bda5b038902e85b85a94a2220715758da6cb7c47eb
pdf-font-stream PDF embedded font (sfnt) at offset 0x76FA 5024 bytes
font_02_sfnt_off00008827.bin
8e7d76295dd1e77b6357cc2528665c48cba28561db5684eb5b9595c9e0c1d66b
pdf-font-stream PDF embedded font (sfnt) at offset 0x8827 10180 bytes