Malicious PDF — malware analysis report

Static analysis result for SHA-256 7417ed3b165dc1b4…

MALICIOUS

PDF

53.1 KB Created: 2020-08-29 18:12:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33efc2259edebff0a0fb19907305b09a SHA-1: b899af32ebe7f47bf8a7196dfa7055ae5123ca51 SHA-256: 7417ed3b165dc1b45b61e3e537ce1d7af09b202332bea30cbd63fec95f104965
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though obfuscated, contains the URL 'https://ttraff.com/wix?keyword=how+full+is+your+bucket+pdf', which is likely intended to lead the user to a malicious site. The presence of numerous embedded links, many pointing to benign-looking PDFs, suggests a link farm or redirection scheme designed to obscure the ultimate malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wix?keyword=how+full+is+your+bucket+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_e7db4e5df721457397b4970c38ae0436.pdf
    • https://static.usrfiles.com/ugd/b8c837_794720be077449388cd86d87b8f395c3.pdf
    • https://static.usrfiles.com/ugd/b8c837_12eb73f1113a465d906497cf408704f6.pdf
    • https://static.usrfiles.com/ugd/b8c837_a840dfc8ee1247688c43a3f04f392573.pdf
    • https://static.usrfiles.com/ugd/b8c837_c9a7583e1a184d6381f80099e6a53d5e.pdf
    • https://static.usrfiles.com/ugd/b8c837_b89b70d13faa442ebdba2253dfcfa388.pdf
    • https://static.usrfiles.com/ugd/b8c837_4c3d7d2fec454c688b25f2e765891efd.pdf
    • https://static.usrfiles.com/ugd/b8c837_ec1581671e9f4cbabdd2bf6ea3278440.pdf
    • https://static.usrfiles.com/ugd/8b49c6_ccd3422a9cf64c45ae3f4a7a61ac2722.pdf
    • https://cdn.shopify.com/s/files/1/0432/5654/5433/files/76873171290.pdf
    • https://cdn.shopify.com/s/files/1/0430/9798/1082/files/poloz.pdf
    • https://cdn.shopify.com/s/files/1/0431/7741/0724/files/wafurofibivig.pdf
    • https://static.usrfiles.com/ugd/b8c837_373ce20d6860424db49265a61ef8f6a9.pdf
    • https://static.usrfiles.com/ugd/b8c837_dc13fbc244d74f92acb39b53a5c5037b.pdf
    • https://static.usrfiles.com/ugd/b8c837_8b05a0a6ff51488e9516e0d1cbbee83e.pdf
    • https://static.usrfiles.com/ugd/97634b_3a2c595f39d24edeb256719a985e27a5.pdf
    • https://static.usrfiles.com/ugd/b8c837_e8b19e7a49484c258ee85c137f1dec9c.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/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00009db9.bin
bc3fe54e2f1dee6e00dc8f9d75187726d9e3ba1b91bc05be3a566acbe28c6ec3		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9DB9 17788 bytes
font_00_sfnt_off000068f2.bin
2a6e5a69c5fb1d6a79488efa1362679efd5bdedffb5540f71329857399a5105b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68F2 5072 bytes
font_01_sfnt_off00007a5b.bin
9142c19811e6ec53b100a7ba654de8cf3f2065a2c12135206e139aaba5945f48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A5B 10420 bytes
font_03_sfnt_off0000b86e.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB86E 4324 bytes

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