Malicious PDF — malware analysis report

Static analysis result for SHA-256 5917520598af63be…

MALICIOUS

PDF

46.0 KB Created: 2020-09-01 04:24:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1df9f36c13ea6a6b1d517e74dd2c0d6 SHA-1: 676f1a82a4d5eacf3f402b47def5c05bb917f61f SHA-256: 5917520598af63becf7fd96e982b433736c77acff26f45a97276015b186e172c
152 Risk Score

Malware Insights

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

The PDF contains embedded URLs that point to a known malicious redirector, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, includes text related to academic proposals and the URL itself, reinforcing the lure. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm further indicates malicious intent.

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=capstone+title+proposal+for+information+technology
    • https://static.usrfiles.com/ugd/b8c837_4364837c90e34bed80cf35080e482e5a.pdf
    • https://static.usrfiles.com/ugd/b5472a_3d1cd8b241834a2bb23366f16c9adbd7.pdf
    • https://static.usrfiles.com/ugd/b8c837_12cdad824b15451aa7f3ac4998643da9.pdf
    • https://cdn.shopify.com/s/files/1/0430/9375/4009/files/vagomafax.pdf
    • https://cdn.shopify.com/s/files/1/0454/7018/7686/files/vokirojami.pdf
    • https://cdn.shopify.com/s/files/1/0436/9498/1273/files/cargador_de_baterias_truper_manual.pdf
    • https://static.usrfiles.com/ugd/b7306e_96fda85d8d184e66a1e0c1a0e78ae9e9.pdf
    • https://static.usrfiles.com/ugd/69b86f_0bf7196abb674ef3b0b5324db37f18dd.pdf
    • https://static.usrfiles.com/ugd/6a7407_0b782b2860424d72bf4c9ab1010edb3a.pdf
    • https://static.usrfiles.com/ugd/b8c837_3660a2cb9bf04d14a9ef227cb72b6c90.pdf
    • https://static.usrfiles.com/ugd/b8c837_7eaab494c2c649598140e8a8cbc426e2.pdf
    • https://static.usrfiles.com/ugd/162fe6_21b67efee8134c1ebe8fa131fd0eef34.pdf
    • https://static.usrfiles.com/ugd/0047a4_24e72a5c6d414b9a92cce8c23ac184e4.pdf
    • https://static.usrfiles.com/ugd/ca300b_d7af3ba585af4c29b6bf4ee49725985d.pdf
    • https://static.usrfiles.com/ugd/b8c837_953e6decbe2a445cbfe6efe51b00db57.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006cf3.bin
fe2b7f8388179a43056a98cf705da5385e7a152470edb96cc3bb68a1be6859dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF3 5436 bytes
font_01_sfnt_off00007f4e.bin
0f1bd0eab70ce834b47af757932afeb54bdea3f22bfe97b179bfe0859e7960f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F4E 13800 bytes