Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa533b1b00efb254…

MALICIOUS

PDF

50.4 KB Created: 2020-08-31 22:39:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b35408279cf89e8f38964f6a55ccbc33 SHA-1: 86f90c07fed97e8eab42809716921de3a8dd244c SHA-256: fa533b1b00efb25465a94710709d32136c7f7b6690fa3547ccadbd5820938675
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=ap+1b+adangal'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The presence of a 'download button' heuristic further suggests a lure to click on these links. The document body itself is heavily obfuscated and contains the malicious URL.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=ap+1b+adangal
    • https://static.usrfiles.com/ugd/49be48_a788a43b1d984563ae045faed86bda4e.pdf
    • https://static.usrfiles.com/ugd/b8c837_88a1fd10b1924492acca1431404190da.pdf
    • https://static.usrfiles.com/ugd/4d400c_e277631c6a0e495885e7b3a5b434f850.pdf
    • https://static.usrfiles.com/ugd/c12414_296671442d9149be95d5991a0b440f2d.pdf
    • https://cdn.shopify.com/s/files/1/0435/8438/9275/files/avast._lijit._com.pdf
    • https://cdn.shopify.com/s/files/1/0435/7039/7339/files/94311014038.pdf
    • https://cdn.shopify.com/s/files/1/0462/7215/1714/files/zununiwekejozagamil.pdf
    • https://cdn.shopify.com/s/files/1/0433/4092/3048/files/50021512177.pdf
    • https://cdn.shopify.com/s/files/1/0438/6563/7019/files/equivalent_fractions_decimals_and_percentages_worksheet.pdf
    • https://static.usrfiles.com/ugd/b8c837_b1a0654b70ed4c788273c6c4335679f8.pdf
    • https://static.usrfiles.com/ugd/b8c837_0ef0b7b5cfa94282a8fa342ea28f6974.pdf
    • https://static.usrfiles.com/ugd/52b593_ec6b81b912d543d0b25e6deee449c37e.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bujebunefevefosilipepeju.pdf
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/fanupububomixiji.pdf
    • https://cdn.shopify.com/s/files/1/0431/6410/6909/files/manodu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4145/5261/files/35308930315.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_off00006d94.bin
0d85df6d750cb27512a57d831fec2d34394a969df5906d6af7c9356bc00762a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D94 5032 bytes
font_01_sfnt_off00007ec8.bin
409bdfe0ca9360a8c6971dddfca887ad2591f4994778c8874b2f34bf017f71d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EC8 9936 bytes
font_02_sfnt_off0000a116.bin
72d8ac11066ff0ffad9cf42e565e9963d9b16dd1e6d6eb985222be54a24f4e95
pdf-font-stream PDF embedded font (sfnt) at offset 0xA116 8596 bytes