Malicious PDF — malware analysis report

Static analysis result for SHA-256 f03fa2b81f246b0a…

MALICIOUS

PDF

41.2 KB Created: 2020-09-02 22:28:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0228de16ab52915112a833f03f346470 SHA-1: 70012eca7900cf6d3fe7ae8b9deb50b53543108b SHA-256: f03fa2b81f246b0a610999652400b84d751279d176c3e75dfd5e4682407721c1
150 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.me/wix?keyword=barcode+39+font+windows+7', which is also flagged as a malicious redirector. This suggests the document is designed to trick users into visiting a malicious site by appearing to offer a useful resource.

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.me/wix?keyword=barcode+39+font+windows+7
    • https://static.usrfiles.com/ugd/83f04e_ba0389e43e6b46d18f383e5ea24a8ef0.pdf
    • https://static.usrfiles.com/ugd/4dd980_8d866ea354c14292918318c854bc0dde.pdf
    • https://static.usrfiles.com/ugd/4d400c_aebad64957434d9c9fa3e1a3b2a275da.pdf
    • https://static.usrfiles.com/ugd/ce0e6d_bd91102287da406abcc1bbc3175a0fa7.pdf
    • https://static.usrfiles.com/ugd/74c34a_cdd5974631ab4f9580474ddf3b332c84.pdf
    • https://cdn.shopify.com/s/files/1/0431/1135/0439/files/10393218092.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wexanenivoxepabulolud.pdf
    • https://cdn.shopify.com/s/files/1/0432/9262/3001/files/xajulazobokugesufavata.pdf
    • https://static.usrfiles.com/ugd/de02f3_880de4fc83184100b937f9ec48528ea1.pdf
    • https://static.usrfiles.com/ugd/7d2910_90e1aad4bf004cd78458344dabf972fe.pdf
    • https://static.usrfiles.com/ugd/b8c837_a8679ef925f6435684dc6b9c5758c7d9.pdf
    • https://static.usrfiles.com/ugd/3f0e57_12e2085288df4fc9830a41b8f43897ef.pdf
    • https://static.usrfiles.com/ugd/dd6616_864273d9bb0741149510bc34c74712fd.pdf
    • https://cdn.shopify.com/s/files/1/0428/7224/2342/files/dominio_archaea_definicion_caracteristicas.pdf
    • https://cdn.shopify.com/s/files/1/0431/9671/1069/files/dinisizorufatotaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/6792/3868/files/broadcast_receiver_internet_connection_in_android_example.pdf
    • https://cdn.shopify.com/s/files/1/0438/8628/0872/files/soraw.pdf
    • https://cdn.shopify.com/s/files/1/0436/2466/1154/files/25910086155.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_off00006303.bin
dd1fab57a3917947a043841b14cbdfad91fec8d94d4d46d34f5177a193f70886
pdf-font-stream PDF embedded font (sfnt) at offset 0x6303 5524 bytes
font_01_sfnt_off000075f4.bin
e12ad84b822d53017139101622599353e9e1c7ecb2c2c2585693830d7d245d4b
pdf-font-stream PDF embedded font (sfnt) at offset 0x75F4 9968 bytes