Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d2a37d85213f44a…

MALICIOUS

PDF

43.6 KB Created: 2020-08-30 22:59:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff68d505662d8b65b4bd9ccc837d0a0f SHA-1: b829f83b3a51a325e8e308bdb017914bea088dfa SHA-256: 0d2a37d85213f44ad96edbe30e16851f3c720d8833ba646404131b29e32f7abd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains text related to game downloads and the malicious URL, suggesting a lure. The presence of numerous embedded links, many pointing to external PDF files, indicates a link farm designed to obscure the true 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=asphalt+8+para+hilesi+indir
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/d775a9_b37bf74718de4c8c83fb7b93badbd5f1.pdf
    • https://static.usrfiles.com/ugd/2ca09c_e13c1bcb21ee46f28d1dc17ad8fa9e66.pdf
    • https://static.usrfiles.com/ugd/b8c837_28f1d2db0f344e64b53422d524295b66.pdf
    • https://static.usrfiles.com/ugd/a2e20a_a4db5237543145f2902c952290513bfd.pdf
    • https://static.usrfiles.com/ugd/b8c837_91e1b159b4c0468ea6ea1cdd32b53f0e.pdf
    • https://cdn.shopify.com/s/files/1/0461/0555/9203/files/first_rank_raju_kannada_movie_hd.pdf
    • https://static.usrfiles.com/ugd/b8c837_1036b049c496476fa302a3d9a69dcf2a.pdf
    • https://static.usrfiles.com/ugd/b9801a_a8764db578b04f678ec85c8dd3f90c4e.pdf
    • https://static.usrfiles.com/ugd/10b11f_3ae7340ba2564150a8b36a557848776e.pdf
    • https://static.usrfiles.com/ugd/b8c837_f27dda2f5d104989be40a1dda5a92873.pdf
    • https://static.usrfiles.com/ugd/41a0b6_1e0d6df823ee488d884d8660ec7cfc26.pdf
    • https://static.usrfiles.com/ugd/b8c837_04b691418b70453aa3f836a0939145b7.pdf
    • https://static.usrfiles.com/ugd/b8c837_4060db543b9e41568b1b0c44969a966b.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fca.bin
5a55712345506b8304fc909e9884eac91581ddd99e9e10e9972afdb00b578559
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FCA 5232 bytes
font_01_sfnt_off0000717c.bin
89a8aa1be246919742b6903ca8ad7e4c14641271368030484bbcdd1500a27fdf
pdf-font-stream PDF embedded font (sfnt) at offset 0x717C 15560 bytes