Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b079ec951e92a7e…

MALICIOUS

PDF

42.0 KB Created: 2020-08-31 06:54:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3263b96149f0ceb9fafbe2e830c38c6a SHA-1: 6e3c1b8c4a72dfab13e41a13074c163e42fe7db8 SHA-256: 0b079ec951e92a7e686588920a5fc8ab9d6e2eee653518e7a6ec42db255587ef
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical redirector link, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains the same malicious URL, suggesting the primary goal is to redirect users to potentially harmful content. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/wix?keyword=the+boss+baby+full+movie+download+in+hindi+300mb
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/1813b3_c489ce6bdf03423281db5757c4d384cd.pdf
    • https://static.usrfiles.com/ugd/b8c837_3a41a56d24bb4d889eca1fc0d0cccd5c.pdf
    • https://static.usrfiles.com/ugd/8b97dd_195cea4eb0644163b09593c890119385.pdf
    • https://static.usrfiles.com/ugd/565485_a933e6ed0a0b4b2ba4d19546079c07fb.pdf
    • https://static.usrfiles.com/ugd/fd30ac_fe86bb62514b44469ca12dcdfefb633f.pdf
    • https://static.usrfiles.com/ugd/b8c837_4a3270639260496eb34cad294cb3dc90.pdf
    • https://static.usrfiles.com/ugd/b8c837_0d99c5cff958414d9f97e2035af8e32a.pdf
    • https://static.usrfiles.com/ugd/5de1df_01a8cf48d71f4573a34a2367674e427f.pdf
    • https://static.usrfiles.com/ugd/b8c837_373ce20d6860424db49265a61ef8f6a9.pdf
    • https://static.usrfiles.com/ugd/b8c837_74e3707b6826426d9c56d050c3e0849f.pdf
    • https://cdn.shopify.com/s/files/1/0454/3050/5628/files/motusobediserodonuvoj.pdf
    • https://cdn.shopify.com/s/files/1/0428/7964/7900/files/kramer_vs_kramer_script.pdf
    • https://cdn.shopify.com/s/files/1/0434/5928/1061/files/abnormal_human_karyotype.pdf
    • https://cdn.shopify.com/s/files/1/0439/7219/8558/files/ginafi.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_off000063fb.bin
e5a6f6621ff476e5522eac008e01af3fe48e18801ce45f39456e6cd15abb6ed8
pdf-font-stream PDF embedded font (sfnt) at offset 0x63FB 5700 bytes
font_01_sfnt_off00007760.bin
3b652e23dab7c0862892335e18d207217c5c907a039763088af174627f282f75
pdf-font-stream PDF embedded font (sfnt) at offset 0x7760 10412 bytes