Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e7361f282edbfff…

MALICIOUS

PDF

39.4 KB Created: 2020-09-19 18:45:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03eb83b3dc1fb840f18c1453196d5466 SHA-1: 51cc51d882169d10421083914e4f363028ecc6b0 SHA-256: 0e7361f282edbfffa99980a8fa8c3e438955c574a7bf5601d7480ecd199abbf1
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO poisoning tactic. One prominent URL, 'https://ttraff.me/wix?keyword=ikeymonitor+apk+full+version', is flagged as a malicious redirector, indicating an attempt to lead users to harmful content. The ML classifier also strongly indicated maliciousness.

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.me/wix?keyword=ikeymonitor+apk+full+version
    • http://files.gbmin.org/uploads/1/3/2/7/132712266/terogaso.pdf
    • http://jenure.lilypadnotes.com/uploads/1/3/0/7/130739090/juromo.pdf
    • http://files.lighthouseorthopaedics.com/uploads/1/3/1/4/131437987/1264266.pdf
    • http://fozure.kristinamcgaha.com/uploads/1/3/1/6/131607119/d1f61.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://52a48868-b10c-468b-9723-585fbc38a214.filesusr.com/ugd/7c3584_0158b167585e47dc94aa00e34d366b10.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0435/6718/6079/files/55141981131.pdf
    • https://cdn.shopify.com/s/files/1/0431/1593/7948/files/bobby_goldsboro_honey.pdf
    • https://81636936-31a4-4549-a421-d1ab25bb4862.filesusr.com/ugd/f35da0_96c443bb4d0c43a7a4f1d908954af3bb.pdf?index=true
    • https://735740dc-fd03-4514-9f00-c128d5d65fd9.filesusr.com/ugd/5f4192_a9e30f405b704377be4ea127ce51129d.pdf?index=true
    • https://c75643bb-38a3-448b-ab0a-20a65ae38c8f.filesusr.com/ugd/7ad284_efbc19ee7dad471a85fe9722179d85a5.pdf?index=true
    • https://c7d56175-01b4-4a61-bc87-c9833613b30b.filesusr.com/ugd/bb3bf9_419d5c3d5c724697b1ec40092fd916e5.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d8e.bin
e192a9a088c33b72963a0749224f8e0075d7e3c719121ac28aed56c20bca413e
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D8E 5092 bytes
font_01_sfnt_off00005ed0.bin
349f95815f5aa64105ad4f31837d01055acca47c05d506a8e971ccab6abb9ac9
pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED0 10612 bytes
font_02_sfnt_off0000831d.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x831D 4324 bytes