Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b1b5e28c70f75a1…

MALICIOUS

PDF

53.0 KB Created: 2020-07-10 09:30:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0bd6c7b97f0fc2f11cf1736ec6e30690 SHA-1: 1a4ed8b5a46e9da7f2f19dc338c50f1388909c00 SHA-256: 9b1b5e28c70f75a104fc9fe28faa1e8c87a34df1d8e48cd218ee83604bc88f68
152 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external sites that appear to be part of a link farm. The primary redirector URL, https://ttraff.cc/wb?keyword=forming%20healthy%20relationships%20pdf, is flagged as malicious. The document's content is minimal, suggesting its purpose is to act as a lure to these malicious sites, likely for phishing or malware distribution.

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/wb?keyword=forming%20healthy%20relationships%20pdf
    • http://files.thebetterbrasspipe.com/uploads/1/3/2/7/132740218/daf3e1d8396c143.pdf
    • http://files.washington-scottish.com/uploads/1/3/0/8/130874318/8b0f395751b7b3.pdf
    • http://files.bellbrookpc.com/uploads/1/3/2/7/132740412/pologamusun.pdf
    • http://files.425sqn.org/uploads/1/3/0/8/130814642/zotazaboma.pdf
    • http://files.sgionet.com/uploads/1/3/0/8/130874413/zujojunejiguwimurob.pdf
    • http://files.blissbeautytruro.co.uk/uploads/1/3/0/8/130874095/59bc104123c3ea.pdf
    • http://files.alanbirtwistle.com/uploads/1/3/1/3/131383664/werox_xapedewero_bemidituziv_zurer.pdf
    • http://files.norcalsmartvestorpro.com/uploads/1/3/2/7/132710655/96f0fa3.pdf
    • http://files.paigeshairsalon.co.uk/uploads/1/3/1/4/131453735/babefexunu.pdf
    • https://fijupuw.files.wordpress.com/2020/07/14360972084.pdf
    • https://kexunezelip.files.wordpress.com/2020/07/8354878562.pdf
    • https://juwurel.files.wordpress.com/2020/07/tumituzazububibuwe.pdf
    • https://dezixoniwi.files.wordpress.com/2020/06/reresadobi.pdf
    • https://xewugof.files.wordpress.com/2020/07/zelomulogugakuzatiwijul.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/befuxaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zurutadodusabexefiba.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81143567733.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mirizopenifipometetotagoz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fejatomamegebuwugibuvu.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_off000090fe.bin
303f6b111f69a457e73e675b63f694d6a51e7acbe5e98fdf42ff3dad06587df3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90FE 5300 bytes
font_01_sfnt_off0000a2db.bin
7c0030a2b9385df5e7b4942a799b6a8cc2d8802fe4412740fd0f7eb5de82f2d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2DB 10692 bytes

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