Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffe9dfbdff8a3b85…

MALICIOUS

PDF

54.0 KB Created: 2020-09-04 01:06:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9becf9f902d2e77b7dcf71e4e16384dd SHA-1: 20fa698e480ab36c7f38eb3bfa41db608f042695 SHA-256: ffe9dfbdff8a3b85b7769543780cb0e208834b39421fae2f25c03f4e1de95784
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The embedded document body text, though heavily obfuscated, contains a URL that matches the malicious redirector link. This indicates the primary purpose of the PDF is to lure users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.club/wix?keyword=year+3+fractions+worksheets+with+answers
    • https://cdn.shopify.com/s/files/1/0427/8226/1415/files/70770968425.pdf
    • https://cdn.shopify.com/s/files/1/0437/6713/6413/files/megepisiwanewu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7149/5574/files/52303664323.pdf
    • https://cdn.shopify.com/s/files/1/0437/2342/3912/files/58982052369.pdf
    • https://cdn.shopify.com/s/files/1/0428/3305/1814/files/45401256192.pdf
    • https://cdn.shopify.com/s/files/1/0430/5820/0725/files/riwafupajaperukalolig.pdf
    • https://cdn.shopify.com/s/files/1/0436/8770/6774/files/zemuwap.pdf
    • https://cdn.shopify.com/s/files/1/0434/0645/9032/files/playerunknown_s_battlegrounds_free_for_windows_7.pdf
    • https://static.usrfiles.com/ugd/c83fdb_aef625ef6d9545fbbf42f79b8db11270.pdf
    • https://static.usrfiles.com/ugd/c068f8_0cd2b40612c64cc0814cddf96c196246.pdf
    • https://static.usrfiles.com/ugd/afe78f_551198ed6dc34b188c3df646551b1a55.pdf
    • https://static.usrfiles.com/ugd/b8c837_d9cca24ff3784981981835209f8035c0.pdf
    • https://static.usrfiles.com/ugd/8dde66_2e251c61bfea4bebb40754522caf10cd.pdf
    • https://cdn.shopify.com/s/files/1/0433/7487/0689/files/bodybuilding_exercises_pictures_training.pdf
    • https://cdn.shopify.com/s/files/1/0432/9832/4638/files/jinotikonowotebaziwuf.pdf
    • https://cdn.shopify.com/s/files/1/0429/2152/5407/files/ardaas_movie_songs.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/10809735118.pdf
    • https://cdn.shopify.com/s/files/1/0464/7914/7176/files/fazuvagidumaxolamuwofu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000095bb.bin
ff263efa5825f5ab54d93251481e6452a908cb8e0ea1a0dbf38aacc4d9c8a7fe
pdf-font-stream PDF embedded font (sfnt) at offset 0x95BB 5216 bytes
font_01_sfnt_off0000a78d.bin
4c11653e0bbfc0e900c2b265cd3bbfad018b50e3c488fa0f3c7a1ea4d355e09f
pdf-font-stream PDF embedded font (sfnt) at offset 0xA78D 10180 bytes