Malicious PDF — malware analysis report

Static analysis result for SHA-256 b592d6e76ca4c2b6…

MALICIOUS

PDF

49.0 KB Created: 2020-08-30 15:16:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3b978d1c7ef13ff8ad095be70738d17 SHA-1: 8394fcce442bf1ddea80826166c7651b6715d553 SHA-256: b592d6e76ca4c2b614932629ce0aa2edc90e268a4d4a18e82ad1516d45152270
152 Risk Score

Malware Insights

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

The 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 heavily obfuscated, contains the URL https://ttraff.ru/wix?keyword=taroth+axe+horn, which is identified as a malicious redirector. Additionally, the file exhibits characteristics of a PDF link farm, embedding numerous links, many pointing to Shopify and static.usrfiles.com domains, likely to obscure the 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.ru/wix?keyword=taroth+axe+horn
    • https://cdn.shopify.com/s/files/1/0434/0521/3852/files/17881404791.pdf
    • https://cdn.shopify.com/s/files/1/0428/6870/3398/files/sql_server_interview_questions_and_answers_pinal_dave.pdf
    • https://cdn.shopify.com/s/files/1/0435/2350/6336/files/96680798118.pdf
    • https://cdn.shopify.com/s/files/1/0432/4530/6011/files/raduzas.pdf
    • https://cdn.shopify.com/s/files/1/0432/5851/1510/files/duzale.pdf
    • https://static.usrfiles.com/ugd/b8c837_5838c8f1798b4f7faba07b119040f1ba.pdf
    • https://static.usrfiles.com/ugd/b8c837_a0d5665c94c84289bad72b7396d0bf35.pdf
    • https://static.usrfiles.com/ugd/b8c837_fc303731d6eb4686ac276f30f5750e27.pdf
    • https://static.usrfiles.com/ugd/50de67_d7c82c07e69c44b39391019b6fe4fa9c.pdf
    • https://static.usrfiles.com/ugd/d78803_4d2d260c76c04e7c85ea1f206c2c15ce.pdf
    • https://static.usrfiles.com/ugd/b8c837_a1c7bc2589ff442eaeb0f013c4b53601.pdf
    • https://static.usrfiles.com/ugd/6290de_cc541c15b59d47a28ad6959393939d74.pdf
    • https://static.usrfiles.com/ugd/0f5b72_1f1188d93f36410b945707edc5eaa44d.pdf
    • https://static.usrfiles.com/ugd/b8c837_4f523f56af1f483e92e1b8739e9867df.pdf
    • https://static.usrfiles.com/ugd/99afdc_04c499fd50b840d28c82dda3f62e50f6.pdf
    • https://static.usrfiles.com/ugd/b8c837_4a8e8b88ce3f42ecaa4fc7149577fd9a.pdf
    • https://static.usrfiles.com/ugd/4cf28d_b7052a44372f42b9a96f4b9eaade0576.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006245.bin
2ce5a7286efefc5aae27ce1c31b3347e159d00bd30cf97f509a0b7f7d49caffb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6245 6440 bytes
font_01_sfnt_off00007209.bin
aab1b7ff99e1417d28fda36c5f883c7572a999cbc7a7d156cd4b3cbdcc59d060		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7209 3664 bytes
font_02_sfnt_off00007f18.bin
0438f0b28767d5d368165fe5d9e39558fbc6973bc3f74f3032fa99f8078960cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F18 4580 bytes
font_03_sfnt_off00008ea4.bin
bdb121af82c92ac82d3c8d3cc761772bfbf244bb96f9ccda2d60e57b29acfee1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EA4 12216 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.