Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc0770ca6e789e53…

MALICIOUS

PDF

42.5 KB Created: 2020-08-30 14:11:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd5c2c732be0fd12be430d7cd599d152 SHA-1: f03be861aee93dca99f0217c911a25846bbeb4ee SHA-256: fc0770ca6e789e5382bd928c786591e5c289e056df13131aa89c2874aa7bd4c2
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic identifying it as a PDF link farm. One of the primary links, 'https://ttraff.cc/wix?keyword=silvered+weapons+dnd+5e', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and other Shopify links, suggesting a coordinated effort to lure users to malicious sites. 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/wix?keyword=silvered+weapons+dnd+5e
    • https://cdn.shopify.com/s/files/1/0431/3730/2690/files/zavalodewifixubifozojixu.pdf
    • https://cdn.shopify.com/s/files/1/0436/4409/2566/files/wivunup.pdf
    • https://cdn.shopify.com/s/files/1/0438/2274/3712/files/niforipesatamonajikoz.pdf
    • https://cdn.shopify.com/s/files/1/0428/6640/9639/files/buvuwukuvuguguramigidi.pdf
    • https://cdn.shopify.com/s/files/1/0437/5298/0641/files/guidestones_georgia_map.pdf
    • https://static.usrfiles.com/ugd/48f461_50215951f3cd4de394226dca84f1831c.pdf
    • https://static.usrfiles.com/ugd/1f5cef_e10520758638450ba546d1d7f8b5f6c9.pdf
    • https://static.usrfiles.com/ugd/b8c837_725656b0a7a34cee9ba910416be135d2.pdf
    • https://static.usrfiles.com/ugd/b8c837_0e31703808bf4874b7dd69aadd26b9a4.pdf
    • https://static.usrfiles.com/ugd/ba3095_83f781b2c71f46fead71162b67ca5c88.pdf
    • https://cdn.shopify.com/s/files/1/0428/4288/2215/files/pokatir.pdf
    • https://cdn.shopify.com/s/files/1/0435/9412/1379/files/zaforotokob.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/85213016947.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_off000063a3.bin
bb20a6fbbec1f14ea9da7fe938b89333ca9dd7cd30496ff82b9ec79402ffb8bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x63A3 5332 bytes
font_01_sfnt_off000075dd.bin
085ca63b5f40a9d1da91ff5db4f8eeeafbf7632e15dae6355ca3c249756be444
pdf-font-stream PDF embedded font (sfnt) at offset 0x75DD 12288 bytes