Malicious PDF — malware analysis report

Static analysis result for SHA-256 30f0e9d7d88f09aa…

MALICIOUS

PDF

45.4 KB Created: 2020-07-08 21:07:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a40262c47b63b982225d28bd5506208 SHA-1: 8061552a3b08032d1fe4d7f8a680542e1e2edfb8 SHA-256: 30f0e9d7d88f09aab6c82ba13589638215d175d96ef68de3036a6b09e9ec8239
154 Risk Score

Malware Insights

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

The PDF document is designed as a lure, masquerading as a manual for a Hartke HD 150 amplifier. It contains a significant number of embedded links, identified by the PDF_SEO_LINK_FARM heuristic, which redirect to various external PDF files. One of the primary redirector links points to ttraff.cc, a known malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The primary intent appears to be to lead users to malicious infrastructure through a link farm.

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=hartke%20hd%20150%20manual%20espa%C3%B1ol
    • http://files.matchmypartytheme.com/uploads/1/3/0/7/130775651/rujezela_jawabar.pdf
    • http://files.folkmusic.com/uploads/1/3/1/4/131407530/4506008.pdf
    • http://files.thealpacacottage.com/uploads/1/3/0/7/130740493/dogogasilejaj-sudibana-roligovezefeg-fijebeganolapi.pdf
    • http://files.artlynchactingcoach.com/uploads/1/3/1/3/131380868/tagaxe.pdf
    • http://files.mskhor.com/uploads/1/3/2/6/132682570/fewogedawox-xabuguj-dajelenudunexo.pdf
    • http://files.haralsoncountyhistory.com/uploads/1/3/2/3/132302913/4438840.pdf
    • http://files.ronnieroseband.com/uploads/1/3/0/8/130813797/a7f99.pdf
    • http://files.joshamayo.com/uploads/1/3/1/8/131857193/pixipafivo.pdf
    • http://files.arlingtonmsband.com/uploads/1/3/1/6/131606087/ddee7.pdf
    • http://files.newclearrain.com/uploads/1/3/1/8/131855992/5820839.pdf
    • http://files.fhcamd.org/uploads/1/3/1/6/131637034/5932877.pdf
    • https://nowigunuki.files.wordpress.com/2020/07/10345833573.pdf
    • https://rujobule.files.wordpress.com/2020/07/fudumo.pdf
    • https://mukupoxoposi.files.wordpress.com/2020/07/nuxiluxiwutopasupo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46676539889.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51994241049.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vuxopikuxoxixu.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_off00007002.bin
7c91d87e061f44bc5401a473a20444a59139d4a5cf0135b5406e246f5063d4ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7002 5588 bytes
font_01_sfnt_off00008290.bin
661a69ef5bbd074faae6cf583312d2ebd1879d74c3085740b1475eaa27b45ae2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8290 11076 bytes

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