Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcfe00861a7bc09b…

MALICIOUS

PDF

42.1 KB Created: 2020-08-31 09:47:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c365164fa540f87f6cfdb1e6e7e71c8d SHA-1: 2bb26a72c6cb4401322cd6a195763d9d423aa9d2 SHA-256: dcfe00861a7bc09bcf8afda51afc3035b77c0fcb56021f4dfd582c54ea914b3e
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector found by the heuristic. This suggests the document is designed to trick users into visiting a malicious site, likely for further exploitation or credential harvesting.

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.link/wix?keyword=mfj-931+artificial+ground+manual
    • https://static.usrfiles.com/ugd/83e24f_bb83faa5cc1b402e92150675edd5ead8.pdf
    • https://static.usrfiles.com/ugd/c1de29_2005b26d5d194b239dcbd2d36b373228.pdf
    • https://static.usrfiles.com/ugd/b8c837_fbca8c6e26074564ae006176727621da.pdf
    • https://static.usrfiles.com/ugd/5cf23b_8af1428118444f59aa79577dcfec6186.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f2326bf082a4b47879fbc8d03a44528.pdf
    • https://cdn.shopify.com/s/files/1/0457/7699/4470/files/grocery_list_template_by_department.pdf
    • https://cdn.shopify.com/s/files/1/0440/6388/3429/files/8032353230.pdf
    • https://cdn.shopify.com/s/files/1/0430/5443/2410/files/53872102169.pdf
    • https://cdn.shopify.com/s/files/1/0433/9073/0405/files/how_to_archive_chat_whatsapp_android.pdf
    • https://cdn.shopify.com/s/files/1/0432/5248/2208/files/21406805866.pdf
    • https://static.usrfiles.com/ugd/8cbfce_57231b6ae39644679b1c788ee5c040e3.pdf
    • https://static.usrfiles.com/ugd/7c3584_fde4ea53baeb46338802f984be1340fc.pdf
    • https://static.usrfiles.com/ugd/b8c837_e62cfd464b1a416fb85931d185a71ad7.pdf
    • https://static.usrfiles.com/ugd/ff2e72_331e8d35ee4f48c8a04d77974b50b993.pdf
    • https://cdn.shopify.com/s/files/1/0431/4005/5208/files/english_speaking_full_course_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/8667/4088/files/abirami_anthathi_tamil_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0462/3283/0106/files/sekiro_how_to_kill_treasure_carp.pdf
    • https://cdn.shopify.com/s/files/1/0430/9309/8660/files/lutotoxosuj.pdf
    • https://cdn.shopify.com/s/files/1/0434/4253/6604/files/19827407390.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_off000064de.bin
35abe52bbc30d7ce574bd01bd3eb35f0cbad945b26ad6ce657f862e172a6cf7e
pdf-font-stream PDF embedded font (sfnt) at offset 0x64DE 5648 bytes
font_01_sfnt_off0000780f.bin
22a71cf4db1caee4f05e7227528302ef22544eedb49ff06ac9d24a08ea6fb394
pdf-font-stream PDF embedded font (sfnt) at offset 0x780F 10300 bytes