Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7c79b1138af75e8…

MALICIOUS

PDF

40.7 KB Created: 2020-09-04 03:43:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9577b90dd60cc766be931cc456045b25 SHA-1: 342b0ce33e144db1feb285419b1b540468850002 SHA-256: a7c79b1138af75e824b19c67f3d746203aa9dce4da172d4afed034e8db27fa79
120 Risk Score

Malware Insights

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

The PDF file contains numerous links, including one pointing to a known malicious redirector at 'ttraff.club'. The document body, though heavily obfuscated, contains text related to 'Whatsapp whistle notification sound free' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The PDF structure and the presence of many external links indicate a link farm or redirection tactic.

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=whatsapp+whistle+notification+sound+free
    • https://cdn.shopify.com/s/files/1/0432/4678/0566/files/coolmathgames_console_hacks.pdf
    • https://cdn.shopify.com/s/files/1/0431/3278/0701/files/bivariate_normal.pdf
    • https://cdn.shopify.com/s/files/1/0466/2552/1829/files/c-cl_bond_length.pdf
    • https://cdn.shopify.com/s/files/1/0434/5459/5224/files/a._n._m_form_2019.pdf
    • https://static.usrfiles.com/ugd/daca0d_49f02bef9ad74e559f13fc4729f884da.pdf
    • https://static.usrfiles.com/ugd/eb6612_2f15bfec48ae4870843fd1742c8ba77e.pdf
    • https://static.usrfiles.com/ugd/111c46_32f77f667d504353a1dd1acfcc00cff2.pdf
    • https://static.usrfiles.com/ugd/c63dba_15bc5f3ab75b49c0a71f78be9879ee26.pdf
    • https://static.usrfiles.com/ugd/c0a468_cb2ae0b8b87244b5b4a6f37490928795.pdf
    • https://static.usrfiles.com/ugd/2f07a1_485a968d9b794c8a9c0e750e0cfae11c.pdf
    • https://static.usrfiles.com/ugd/98857b_feca240775594118bc73a058996e1b21.pdf
    • https://static.usrfiles.com/ugd/67e251_b4e8017a328b463898ffefb049914ce6.pdf
    • https://static.usrfiles.com/ugd/20d83a_98de86c509b64f4fa4d26c4958bde291.pdf
    • https://static.usrfiles.com/ugd/b8c837_477f3ffc5768402d8ab933cb0032aa9c.pdf
    • https://static.usrfiles.com/ugd/b8c837_72cc9411a6e04e4992ef968791678a7a.pdf
    • https://static.usrfiles.com/ugd/65b209_61259cb1d5684042af03783035208c48.pdf
    • https://static.usrfiles.com/ugd/5e8de6_88080c6d2aea4f2ebf8ee6509611b2b0.pdf
    • https://static.usrfiles.com/ugd/217d68_4671402dd3154e4297b7c344a6df3d6f.pdf
    • https://static.usrfiles.com/ugd/122077_14460b0575d24a14a5de9c117a0105ac.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_off00004a9b.bin
3f2a915afca3d45908f0ad98abc46c1abc52d459894f0b5a65e80c55dc1643b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A9B 5348 bytes
font_01_sfnt_off00005ce0.bin
f1f0816ebe85c7eb26733899af244f55ddb798a6b893b13a1f9e742410df12ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CE0 9696 bytes
font_02_sfnt_off00007e38.bin
fe1ca6a691315ef32827512bb86cd3188d7c30cfa02bd4559714794831c9b14a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E38 16684 bytes