Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d6609e67afec618…

MALICIOUS

PDF

103.0 KB Created: 2020-07-14 09:45:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d9fe2be79517e6a28060cdbcca737eb SHA-1: 467936defe9c5dbedbdb3d274bc6b76d48ed84be SHA-256: 5d6609e67afec618cf4a32d0e1d1b19cc0a73338ec64fbd02439f52c87787d6a
162 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to known malicious redirector infrastructure (ttraff.com). The document body, though heavily obfuscated, suggests a lure related to a 'Ms powerpoint 2007 tutorial pdf'. The presence of a 'download button' heuristic further supports a malicious download or redirection attempt. While no scripts were explicitly extracted, the PDF structure and link farm indicate a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=ms%20powerpoint%202007%20tutorial%20pdf
    • http://files.bravoballoon.com/uploads/1/3/0/8/130874639/xefivawi.pdf
    • http://files.bkyogapsychotherapy.com/uploads/1/3/2/6/132695887/5f06c04d5.pdf
    • http://files.irishtimber.org/uploads/1/3/1/8/131856954/9640888.pdf
    • http://files.perfect-stride.com/uploads/1/3/0/7/130739142/sowexo_folod.pdf
    • http://files.inter-nda.com/uploads/1/3/1/4/131437225/843ced6e0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://xovabek.files.wordpress.com/2020/07/xajiwotogaxidabobo.pdf
    • https://tabunujifafa.files.wordpress.com/2020/06/xawiziragiwumujusezoro.pdf
    • https://digogaba.files.wordpress.com/2020/07/4852268468.pdf
    • https://susikebe.files.wordpress.com/2020/07/pexererasiw.pdf
    • https://sulupovabas.files.wordpress.com/2020/06/vufozuwefizidozem.pdf
    • https://zuterejesami.files.wordpress.com/2020/06/tamivuwakerudalojufogat.pdf
    • https://vafixumev.files.wordpress.com/2020/06/95062365704.pdf
    • https://cdn.shopify.com/s/files/1/0429/0691/0876/files/kiruba.pdf
    • https://cdn.shopify.com/s/files/1/0432/8026/9462/files/54383184249.pdf
    • https://cdn.shopify.com/s/files/1/0429/9672/7962/files/85615189928.pdf
    • https://cdn.shopify.com/s/files/1/0427/5660/4070/files/vojojajavizanobitu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0789/3919/files/nujadenudaxumilaw.pdf
    • https://cdn.shopify.com/s/files/1/0429/9456/5271/files/wonuwe.pdf
    • https://cdn.shopify.com/s/files/1/0431/0496/0676/files/61083506033.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rowogumidakedodovejizana.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_off00015804.bin
5827d6a3725cc4060ead6ded9dba5813b6830b811e9b7a3015fd95909cb0e56b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15804 5368 bytes
font_01_sfnt_off00016a72.bin
089a200ec5745690bbd1e799257700c75ffd93fd51b234d82e7d29bf17124f01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16A72 10420 bytes

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