Malicious PDF — malware analysis report

Static analysis result for SHA-256 59e8b0d9f64cbb5f…

MALICIOUS

PDF

43.6 KB Created: 2020-09-02 04:50:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 094a705f3b7fd8aca114f2c86cbf6e45 SHA-1: 8cda74dc92297be291c0ff26ac734ea16bd29155 SHA-256: 59e8b0d9f64cbb5f103c291ab3f75a950f1848f7ca36f02fd7d0c81c3e349d79
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is designed to lure users into downloading further malicious content. The document body, though heavily obfuscated, contains the same URL, suggesting it is the primary lure. The presence of numerous links to external PDFs, many hosted on static.usrfiles.com, indicates a link farm strategy to improve search engine ranking and visibility for the malicious lure. No scripts were extracted, but the PDF structure and embedded links strongly suggest a social engineering attack.

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.club/wix?keyword=geomorphology+by+savindra+singh+pdf+free
    • https://static.usrfiles.com/ugd/b8c837_65753c6de48c4181ab587ea8a8e608a2.pdf
    • https://static.usrfiles.com/ugd/3f0e57_58e1478c5e5241c9aa4e0b501223743f.pdf
    • https://static.usrfiles.com/ugd/b8c837_d3eeb3ced771494d89cdb5f217548af8.pdf
    • https://static.usrfiles.com/ugd/430cb2_027fa3cb54694ee4bbd2a8630b5d5802.pdf
    • https://static.usrfiles.com/ugd/0e9fc2_3ae4a8d1feb248d4be5734b123e34069.pdf
    • https://static.usrfiles.com/ugd/8ab72e_9c544839112248a68d92cbfca533c142.pdf
    • https://static.usrfiles.com/ugd/b8c837_6179b3ed0bff4befaad311c9379ff390.pdf
    • https://static.usrfiles.com/ugd/dba42a_31f84a2bd8ee4eabb6256cffd592c2d8.pdf
    • https://static.usrfiles.com/ugd/f5a024_c6c42d1bf53548a0a644364253ae85d4.pdf
    • https://static.usrfiles.com/ugd/40b9e6_703697c937184a30bb25184c04bd9145.pdf
    • https://static.usrfiles.com/ugd/04e6f9_c09482d1bf01458394ea0d2e66cc183b.pdf
    • https://cdn.shopify.com/s/files/1/0430/8575/8617/files/jejuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/0951/5415/files/fajoneno.pdf
    • https://cdn.shopify.com/s/files/1/0437/8679/7213/files/57652928022.pdf
    • https://cdn.shopify.com/s/files/1/0432/2010/7424/files/lvmh_moet_hennessy_louis_vuitton_annual_report.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_off00005a80.bin
5e7a33b6669cc5c4b8f2e6938f0b680cdf3930fd1f7ffef3893882d31adaf4af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A80 5788 bytes
font_01_sfnt_off00006e11.bin
f7ca905d0f32f1c0f6f350ddbae4d8cc21631119c1c4eb9fd21f3fd9aeeaf26b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E11 10176 bytes
font_02_sfnt_off0000912c.bin
6632517d666ae6e0f0778725177c4cf62709596e2c0c3e5cb7fce357b901fb04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x912C 4320 bytes

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