Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f52dff53674b6d2…

MALICIOUS

PDF

70.8 KB Created: 2020-09-01 08:17:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a0d04712297facfbc114df992863da6 SHA-1: e329cd83fc416de7c15fbb9a00662ac5616db91f SHA-256: 0f52dff53674b6d275b19093f1ce880a7d9576e3f2995f5ce665da3200bf0eb4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a significant number of embedded links, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, contains URLs that are part of a link farm. This suggests the primary purpose is to lure users to malicious sites, likely for phishing or to download further malware.

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=shakira+waka+waka+video+song
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/9904c2_7dabd31b17f8459bab519e5c087cc0e8.pdf
    • https://static.usrfiles.com/ugd/96768c_2eca5226ac1d40d4ad69566af48c41c9.pdf
    • https://static.usrfiles.com/ugd/cd79e3_d4833ccce23f4e2a93f1d381c755135d.pdf
    • https://static.usrfiles.com/ugd/314c35_7f2f975eabc5415e876bc4afeb312d95.pdf
    • https://static.usrfiles.com/ugd/b65acf_aeecdcbbfc3e4133866e9f7fa9747da4.pdf
    • https://static.usrfiles.com/ugd/b8c837_62694bd5de174a3cbe575983660a3ff1.pdf
    • https://static.usrfiles.com/ugd/e4ff69_0587ad537eef4d00a8e22f84950d9b0c.pdf
    • https://static.usrfiles.com/ugd/eb6612_81209ff0c11f45d9aa6efdd07c9b1201.pdf
    • https://static.usrfiles.com/ugd/2f3ac6_da0bb36767a346e6a53c6681a3cd318c.pdf
    • https://cdn.shopify.com/s/files/1/0434/6655/5549/files/queen_size_quilt_patterns.pdf
    • https://cdn.shopify.com/s/files/1/0445/3584/0932/files/tactics_for_listening_developing.pdf
    • https://cdn.shopify.com/s/files/1/0432/5366/1864/files/jedojoruzozaxusotujubo.pdf
    • https://cdn.shopify.com/s/files/1/0435/2439/1067/files/70923079800.pdf
    • https://cdn.shopify.com/s/files/1/0428/8184/3356/files/auto_indent_shortcut_android_studio.pdf
    • https://cdn.shopify.com/s/files/1/0433/5042/5753/files/freesheetpianomusic_swan_lake.pdf
    • https://cdn.shopify.com/s/files/1/0431/2802/9345/files/the_beatles_piano.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_off0000d1ae.bin
a1d0bf6d09fa68d93a2deb1b68e94dee37ce64ea5092bab05e9bc8fb69662984
pdf-font-stream PDF embedded font (sfnt) at offset 0xD1AE 5372 bytes
font_01_sfnt_off0000e405.bin
7e2cb54682b4d75269d3f3e9ef5d0b8122c9cd04f07a5080034b24d1d1bf0a2f
pdf-font-stream PDF embedded font (sfnt) at offset 0xE405 13204 bytes