Malicious PDF — malware analysis report

Static analysis result for SHA-256 aabae736cde057bd…

MALICIOUS

PDF

47.1 KB Created: 2020-08-15 05:23:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca3cadeea1f6e61333747a6057afb17f SHA-1: 8a7a13f53f167e3007d624d734be762149c19ebb SHA-256: aabae736cde057bd1c3e0db28ce9987b637c1591d541b6f71f02b182517c8c74
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The ML classifier also flagged this PDF with high confidence. The document body contains a reference to 'Mandrake movie parents guide', suggesting a lure to entice users to click on the links. The primary attack pattern involves redirecting users to potentially malicious content.

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/pify?keyword=mandrake+movie+parents+guide
    • http://files.jacquelinemiddleton.com/uploads/1/3/1/8/131856365/busipikulikekizefudo.pdf
    • http://files.christisobel.com/uploads/1/3/1/6/131636808/a944ef17d979ed3.pdf
    • http://files.groundedplantandfloral.com/uploads/1/3/1/4/131454816/pubexidevusujenunez.pdf
    • http://files.cornflowerglass.com/uploads/1/3/2/7/132740253/supelaligarug.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xigorekotat.pdf
    • https://cdn.shopify.com/s/files/1/0427/7331/5740/files/74450318423.pdf
    • https://cdn.shopify.com/s/files/1/0428/6981/7511/files/zofemukofibigilanajisu.pdf
    • https://cdn.shopify.com/s/files/1/0427/6515/6508/files/37655512912.pdf
    • https://cdn.shopify.com/s/files/1/0433/1785/4373/files/gilazipeviweto.pdf
    • https://cdn.shopify.com/s/files/1/0446/1376/3235/files/consonant_clusters_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0437/8175/0941/files/behave_sapolsky_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/5934/5573/files/watch_the_avengers_online_for_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/6028/0992/files/northwestern_territory_tent_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/47711656088.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_off00007a56.bin
ca8cba05b1a1580dda14247a717e9cedcccaaae73cbe1988062e27cbe6c94e40
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A56 5376 bytes
font_01_sfnt_off00008c97.bin
822f3b6f59b71d55f69ea51481f52c970f18f25bfd0e5229d02a8d39f4f2223c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C97 10332 bytes