Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e4886ef3150883d…

MALICIOUS

PDF

47.9 KB Created: 2020-09-01 00:57:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c010669805f32a0b88bbfb4ebbead9a SHA-1: 79a74813fa64afe95283c94637da7db11b396971 SHA-256: 7e4886ef3150883dbf6769659ca902dd8df9214ba019e7bf91d5bfc15876b9ef
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector at 'https://ttraff.com/wix?keyword=google+spreadsheet+apple'. The document body, though heavily obfuscated, contains text that appears to be a lure for a Google spreadsheet. The ML classifier strongly indicated maliciousness, and the presence of a link farm further supports a malicious intent to redirect users to potentially harmful content.

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=google+spreadsheet+apple
    • https://static.usrfiles.com/ugd/81d6a4_ff5811a85c3648c6aa8f429703e43d63.pdf
    • https://static.usrfiles.com/ugd/d5d855_848c35107ab447bfa3a05884d29b9903.pdf
    • https://static.usrfiles.com/ugd/b8c837_c2a34f99e45c4631a1cac9d382272220.pdf
    • https://static.usrfiles.com/ugd/83e24f_703e623027a64d1ca1610229f52c53e3.pdf
    • https://static.usrfiles.com/ugd/cf14a4_2b6622b6f0334d6fb3f2cd7a78cdeab1.pdf
    • https://static.usrfiles.com/ugd/c5d40f_5597762f3f22430a83efdc513f8aaa51.pdf
    • https://static.usrfiles.com/ugd/b8c837_d4abe030a28849f59177128ae9d76235.pdf
    • https://cdn.shopify.com/s/files/1/0439/6960/9886/files/36049487736.pdf
    • https://cdn.shopify.com/s/files/1/0432/8852/7013/files/ziforuzifo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4619/8683/files/warframe_norg_fishing_spot.pdf
    • https://static.usrfiles.com/ugd/b77b08_96bff782d6664a948627da2b9571ca3b.pdf
    • https://static.usrfiles.com/ugd/b8c837_b78163a9bbf3495c8c4378ef908fa1d9.pdf
    • https://static.usrfiles.com/ugd/b8c837_43597533810547daa7ba4c2ad732d0a5.pdf
    • https://static.usrfiles.com/ugd/b8c837_ca7214c10c1b47438db081708e9ff2ce.pdf
    • https://static.usrfiles.com/ugd/b8c837_6b899ab10df643aa8f2c7ed99b910432.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_off000074ab.bin
db45c3d3a7f269f3f98148871f3edf5831621052552a12c36280e56c9c128330		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74AB 5252 bytes
font_01_sfnt_off00008678.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8678 1800 bytes
font_02_sfnt_off00008f05.bin
cd639a913bfba0e0e87204d41e8e3f35893a70d2c5bb5e5f2c1fbad0a40a9d35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F05 10964 bytes

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