Malicious PDF — malware analysis report

Static analysis result for SHA-256 f16b4e0eb5948a6f…

MALICIOUS

PDF

54.3 KB Created: 2020-08-31 21:21:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a94064c6468c483a2d22457cde3ca1c9 SHA-1: 8db6c6b2cbf6d2398360312e8a7d03cf42a0d02d SHA-256: f16b4e0eb5948a6f46bd33dbfe401db5a255a0659fc666c226cd4553c2fcff07
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=8th+habit+videos, which is identified as a malicious redirector. The presence of numerous links to external PDFs, many hosted on cdn.shopify.com, suggests an attempt to manipulate search engine results or distribute further malicious content.

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.com/pify?keyword=8th+habit+videos
    • https://cdn.shopify.com/s/files/1/0430/5672/6165/files/kazavibur.pdf
    • https://cdn.shopify.com/s/files/1/0435/8399/6063/files/15933931618.pdf
    • https://cdn.shopify.com/s/files/1/0458/1408/7846/files/information_about_6th_generation_of_computer.pdf
    • https://cdn.shopify.com/s/files/1/0433/5062/2358/files/convert_cdr_file_to_jpg_format.pdf
    • https://cdn.shopify.com/s/files/1/0429/5753/7439/files/wanisamijupim.pdf
    • https://static.usrfiles.com/ugd/197ed4_7e55bd97e625406ca647d0cc0481cd91.pdf
    • https://static.usrfiles.com/ugd/5b9365_c33f68e6c37e4d7ba0732e1cfee0ad18.pdf
    • https://static.usrfiles.com/ugd/ca300b_60d9469e61ee4a44abb3be296d3710e8.pdf
    • https://static.usrfiles.com/ugd/e6092c_3aff33070f0943b58405aad5a76b57c8.pdf
    • https://static.usrfiles.com/ugd/b8c837_192c92c0d559484dac893d6c930670a3.pdf
    • https://static.usrfiles.com/ugd/2f8cea_ffa01331e6514f238bedef420f172dcf.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_ce90191b81964121b3986f9f825b2fbb.pdf
    • https://static.usrfiles.com/ugd/b8c837_bc2a8d158dd94335a705d6c1246d6646.pdf
    • https://cdn.shopify.com/s/files/1/0438/9991/2344/files/alzheimer_e_parkinson.pdf
    • https://cdn.shopify.com/s/files/1/0463/0387/1138/files/puzefojapuwivetabes.pdf
    • https://cdn.shopify.com/s/files/1/0427/4877/2519/files/xamalavafemegefolupoles.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_off00008c11.bin
ab6b887e5a71ef12930c8c215a00d6fd7c2d9a65a48dbcb187b7ac8dfbb9044a
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C11 2308 bytes
font_01_sfnt_off0000967c.bin
881cf4bf69b94a379085f4bbde47355a1c5c18373d5ad11d9e06a9a56ea0516b
pdf-font-stream PDF embedded font (sfnt) at offset 0x967C 5084 bytes
font_02_sfnt_off0000a7c7.bin
40456a5185137890588feaf11e603aca95c770dbe58c01f188ac24fa20d5e457
pdf-font-stream PDF embedded font (sfnt) at offset 0xA7C7 10592 bytes