Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ba0d3ffe000ae87…

MALICIOUS

PDF

40.5 KB Created: 2020-08-02 04:49:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb4ef9fcec343b15ab426f5f91e340ee SHA-1: ef9fcd4df3c481e4b54646f8e2f5e4b86091878b SHA-256: 3ba0d3ffe000ae87b97f531482304046e90e63ac606ecb4e132c012c9d7b4eb4
152 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector (ttraff.cc). The document body, though heavily obfuscated, contains references to the redirector URL and a large number of other PDF files hosted on Shopify. This suggests a link farm or redirection scheme designed to lead users to malicious 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.cc/pify?keyword=cardcaptor+sakura+wallpaper
    • http://files.rootedlifecoach.com/uploads/1/3/2/6/132681971/juketuzuloxivux.pdf
    • http://files.shelleygreenyoga.com/uploads/1/3/0/7/130740258/pajagotaj.pdf
    • http://files.mrsea.org/uploads/1/3/0/7/130739996/6071392.pdf
    • http://files.kappahouseonprospect.com/uploads/1/3/0/7/130775859/bifisaku.pdf
    • http://files.jimsv8vair.net/uploads/1/3/1/6/131636712/1818086.pdf
    • https://cdn.shopify.com/s/files/1/0432/5425/1670/files/35346558955.pdf
    • https://cdn.shopify.com/s/files/1/0429/4085/8527/files/xebeladifafarif.pdf
    • https://cdn.shopify.com/s/files/1/0431/5162/2305/files/11969259754.pdf
    • https://cdn.shopify.com/s/files/1/0438/2952/6688/files/gedinilebejumejuwuxosive.pdf
    • https://cdn.shopify.com/s/files/1/0434/5744/6050/files/93833318137.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/radeziwiwilajumigetadad.pdf
    • https://cdn.shopify.com/s/files/1/0430/1353/7951/files/five_card_stud_movie.pdf
    • https://cdn.shopify.com/s/files/1/0432/4445/4056/files/40615113677.pdf
    • https://cdn.shopify.com/s/files/1/0434/5298/9605/files/3479439506.pdf
    • https://cdn.shopify.com/s/files/1/0440/3272/1046/files/72834122484.pdf
    • https://cdn.shopify.com/s/files/1/0447/2664/8985/files/step_up_3_full_movie_123movies.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_off000058ca.bin
9415c5f73894d30112719b5b98c8bcf3ec85c8fab7db88932f9520f6950f9711
pdf-font-stream PDF embedded font (sfnt) at offset 0x58CA 5128 bytes
font_01_sfnt_off00006a5d.bin
5bbb330d4487fef5dd8f7c0033fd93a7f92b22fd4ab4283c23022503bb8a9ade
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A5D 13484 bytes