Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceb2dd608e36f537…

MALICIOUS

PDF

55.2 KB Created: 2020-08-31 06:56:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7ae2cda9d3bf77cba32a74c163c522a SHA-1: 5d0f756e614633d92742c5767af7b3c351ae4992 SHA-256: ceb2dd608e36f5373d6592a566f0c40cc07f6b46afdd21e331cf2ce14c41baa9
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating a link to known malicious redirector infrastructure. The embedded URL 'https://ttraff.cc/wix?keyword=pronto+socorro+parque+dos+camargos' is the primary indicator of malicious intent. Additionally, the PDF hosts a link farm with numerous external PDF links, suggesting an attempt to manipulate search engine results or distribute content widely. The document body, though heavily obfuscated, contains the same redirector URL.

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=pronto+socorro+parque+dos+camargos
    • https://static.usrfiles.com/ugd/b8c837_f160cccd797b40dc8753f7f406c2e438.pdf
    • https://static.usrfiles.com/ugd/ee9d3f_6b84d774b4ed418a90aa80c29a7c4898.pdf
    • https://static.usrfiles.com/ugd/6c032c_f00276c4702145ab95034f44eaf3b943.pdf
    • https://cdn.shopify.com/s/files/1/0433/6438/4927/files/psikolojik_danma_kuramlar_vize_so.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e721ad7b5454fb48fa1b5ac54405ad1.pdf
    • https://static.usrfiles.com/ugd/eed56f_ff77ae05fec8470494844a23a9996df8.pdf
    • https://static.usrfiles.com/ugd/c3f88d_086f73566c1c47c4aac6fcdf478c1dd0.pdf
    • https://static.usrfiles.com/ugd/b8c837_b199982e9424494faa47077ed883b1b5.pdf
    • https://static.usrfiles.com/ugd/b88e3d_1ae2e3134191443a8156eeb4a01c0e97.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jenodilibaxu.pdf
    • https://cdn.shopify.com/s/files/1/0427/4959/1718/files/33735718285.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_off000088cc.bin
badb3e4c3c2150d5ae8634ad19970134f1f3e2a5223c424d67c6c984ff3b5cce
pdf-font-stream PDF embedded font (sfnt) at offset 0x88CC 5488 bytes
font_01_sfnt_off00009b4f.bin
c71925053875de5649d30409f541fa6f74ee0d36fce029bca624dcc47e2725ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B4F 17092 bytes