Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c75b679d0004072…

MALICIOUS

PDF

49.5 KB Created: 2020-08-31 11:00:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1ce2c7e33150e650ab18f3de97416b1 SHA-1: 1baa0ab3d269b0f0d740ff70aca7b724144aeabb SHA-256: 3c75b679d0004072fe6afb1c911ce5353dded58a96fb324ce5a563f9fddd70b8
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. The document body, though heavily obfuscated, also contains this URL. The presence of a link farm heuristic suggests an attempt to manipulate search engine results or distribute malicious links broadly. 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.ru/wix?keyword=hemoroid+patl%25C4%25B1can+k%25C3%25B6zlemesi
    • https://static.usrfiles.com/ugd/b8c837_1222179c8d6948a5a40eb6c91c9f5962.pdf
    • https://static.usrfiles.com/ugd/822ecd_eec85e8959dd419a9122db0cabca6537.pdf
    • https://static.usrfiles.com/ugd/912de2_a19763da0a3948218bf2b5760d21e215.pdf
    • https://static.usrfiles.com/ugd/4c1554_39c70c6ae47a43d48044f4c455131c50.pdf
    • https://static.usrfiles.com/ugd/58a813_c47e73b360c54727838cd30529d7b69e.pdf
    • https://cdn.shopify.com/s/files/1/0440/4156/8421/files/11530638838.pdf
    • https://cdn.shopify.com/s/files/1/0431/0636/9703/files/ama_road_rport.pdf
    • https://cdn.shopify.com/s/files/1/0433/3142/0314/files/11025485746.pdf
    • https://cdn.shopify.com/s/files/1/0428/3046/3135/files/23664360202.pdf
    • https://cdn.shopify.com/s/files/1/0431/5217/9364/files/nms_save_editor.pdf
    • https://static.usrfiles.com/ugd/a2e20a_4dbbeb7636314ddf857c5e152d143465.pdf
    • https://static.usrfiles.com/ugd/8127dd_09f7a654d5034628be931d9ec0de9025.pdf
    • https://static.usrfiles.com/ugd/760101_46811cb2690d448aa72791221e8050cb.pdf
    • https://static.usrfiles.com/ugd/c3548c_419f4bfd0b484354adfd35c7250cd284.pdf
    • https://static.usrfiles.com/ugd/c618e9_072c4a30c69d499787f00fd3b59cbdf6.pdf
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/sapeduxonezikibakatijepap.pdf
    • https://cdn.shopify.com/s/files/1/0441/0392/5912/files/pip_install_gdal.pdf
    • https://cdn.shopify.com/s/files/1/0465/1941/9038/files/capitulo_3a_realidades_2_answers_pg_53.pdf
    • https://cdn.shopify.com/s/files/1/0434/3254/2369/files/94597570278.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/
    • https://static.usrfiles.com/ugd/a2e20a_4

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007fef.bin
40300426474c93f56cb9a3fda035e3b79b68625485c01a703beaf1574d066094
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FEF 5464 bytes
font_01_sfnt_off00009231.bin
6f6cd24f1257ee1294def2a1cb6a07b13d83f1f1f01e566ffed8565c89955bc9
pdf-font-stream PDF embedded font (sfnt) at offset 0x9231 11980 bytes