Malicious PDF — malware analysis report

Static analysis result for SHA-256 72b7278c96f94786…

MALICIOUS

PDF

39.8 KB Created: 2020-08-30 02:32:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8717363eb428af18fcbc85891dca6b92 SHA-1: 169ab047e49161754e68862a536ccec34626588c SHA-256: 72b7278c96f94786855d0907f2a4629281dc7ed07720bd861a374fe5709c3ffc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm of numerous external PDF documents, with the primary link directing to a known malicious redirector. This suggests the document's purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, and the document body is heavily obfuscated, making it difficult to determine the exact lure.

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.com/wix?keyword=ses+%25C5%259Fiddetini+art%25C4%25B1rmaya+yarayan+ara%25C3%25A7lar
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_2b546b7558644c3e81c4cf2baa630048.pdf
    • https://static.usrfiles.com/ugd/2c8d66_d2155c3ebaf14fb8b3179691f0d2026a.pdf
    • https://static.usrfiles.com/ugd/b8c837_38cd90dd58504d1fadfffde7be757e50.pdf
    • https://static.usrfiles.com/ugd/48d9a1_473dec14915c4c968ef913b2bead8b25.pdf
    • https://static.usrfiles.com/ugd/b8c837_300e8535d27944a58bf38654d79e90ec.pdf
    • https://static.usrfiles.com/ugd/a382ee_b106551192eb454097af52180d454c1d.pdf
    • https://static.usrfiles.com/ugd/b52961_fa87bf37716e4effbdb9d3f9f121fec9.pdf
    • https://static.usrfiles.com/ugd/f84671_81d0bbe40cda4cdaa25e0d58bc59aa99.pdf
    • https://static.usrfiles.com/ugd/b8c837_0527b986961c445b9b59675309c63cd2.pdf
    • https://cdn.shopify.com/s/files/1/0446/6409/4873/files/grit_blasting_process.pdf
    • https://cdn.shopify.com/s/files/1/0431/1662/6082/files/sigametazi.pdf
    • https://static.usrfiles.com/ugd/66c878_3a944dbb96b54dd98732500e3ea2a3ad.pdf
    • https://static.usrfiles.com/ugd/ade4e6_1a9db5c449c4450fb799e0b5264d9804.pdf
    • https://static.usrfiles.com/ugd/3bca44_5f725190f0f54409a77ae8f2e706472a.pdf
    • https://static.usrfiles.com/ugd/cb4a18_11bc8658628a4472aab7283f29acf7a8.pdf
    • https://static.usrfiles.com/ugd/5ad03d_fb81f08efa2a4ebba1cb0c34730c8c4d.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_off000058a6.bin
7a1485435c9f870867f1d86d40dc7ea65edf497682f73eb151b6310e619ef9d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x58A6 5640 bytes
font_01_sfnt_off00006b0f.bin
b7ba8b57fc366d9c0b8a43d72935b0c46be7adc627b6a997e77f195c48c78488
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B0F 11800 bytes