Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5c64ed643838c0f…

MALICIOUS

PDF

44.0 KB Created: 2020-09-02 23:46:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00746127f6db27a36a853373cf10f086 SHA-1: 64369cb715f77229682e4f66536705b347e6f9ce SHA-256: e5c64ed643838c0f9fc9f588db31a81c23b5afc32fb4fa0f2f66cfac1cb5f80b
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.link/wix?keyword=thor+with+stormbreaker+full+hd+wallpaper', is presented as a lure for downloading a wallpaper. The PDF also exhibits characteristics of a link farm, with numerous external links, many pointing to Shopify domains, though one specific redirector is flagged as malicious. The ML classifier strongly indicates maliciousness.

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.link/wix?keyword=thor+with+stormbreaker+full+hd+wallpaper
    • https://static.usrfiles.com/ugd/c836c3_fcfb436bef974be6851aa28f357e9e10.pdf
    • https://static.usrfiles.com/ugd/b8c837_d00699e14d084271a2a4c8d3ad75c5f0.pdf
    • https://static.usrfiles.com/ugd/5be868_7753c4fbc1f04d1e88e7878366d2d5fb.pdf
    • https://cdn.shopify.com/s/files/1/0427/8507/9452/files/kegefalegopaxagexubapef.pdf
    • https://cdn.shopify.com/s/files/1/0430/0711/5423/files/giradurididafid.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/ruroxozi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5247/4267/files/charm_sukh_episode_2_full.pdf
    • https://cdn.shopify.com/s/files/1/0436/8039/9513/files/72823282077.pdf
    • https://cdn.shopify.com/s/files/1/0431/2861/9168/files/4720348087.pdf
    • https://cdn.shopify.com/s/files/1/0440/5824/7320/files/dojurigonuwavasuxow.pdf
    • https://static.usrfiles.com/ugd/cf14a4_c1de8feb60d44a9386d984446726882a.pdf
    • https://static.usrfiles.com/ugd/f459ea_23e46ebcd6c74faf942ed25b0ad0f829.pdf
    • https://static.usrfiles.com/ugd/9cc572_4ecebe473d1e4b9ea8b2fd1a6cf38427.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_off00004e58.bin
2eab7445a167d263d310bdf2564c66df8c2f38f16ab3634853f154934fb96a2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E58 5528 bytes
font_01_sfnt_off00006100.bin
242a42d807433bf11b32c1be8756eded7fe6466a093c25cd3a606b4f0a198478		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6100 14236 bytes
font_02_sfnt_off00008d7d.bin
4b52fd5da643d9c08cc0a86f773b2f024e3274f3f861dfcac100db1ef433cf06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D7D 16164 bytes

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