Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5c2a0601676bdea…

MALICIOUS

PDF

47.6 KB Created: 2020-08-31 04:37:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 251854bbadebb09fc3bba907b0fb58a2 SHA-1: 072cf50c56c9f99bf6f1ed8b566d0f67600f5882 SHA-256: d5c2a0601676bdea3a69a5ba89febcb4046eb57714ef401ac1cd325e261f3378
154 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. The embedded URL https://ttraff.cc/wix?keyword=el+rival+mas+debil+juego is the primary indicator of this malicious redirection. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent.

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=el+rival+mas+debil+juego
    • https://static.usrfiles.com/ugd/33c377_950e15e072b7470ea40c9cd08d9cb795.pdf
    • https://static.usrfiles.com/ugd/c7a620_361567068ca14041942fa8e576c1c260.pdf
    • https://static.usrfiles.com/ugd/b8c837_e932bb83e56f44c2acd3c97be955dd67.pdf
    • https://static.usrfiles.com/ugd/c1108c_18948fca2a814320b8477be4862f8967.pdf
    • https://static.usrfiles.com/ugd/ea2f88_154a8c13f93c4ce7a6e9f680a26c8a88.pdf
    • https://cdn.shopify.com/s/files/1/0431/7449/4369/files/business_in_kenya.pdf
    • https://cdn.shopify.com/s/files/1/0438/6321/2192/files/77470733768.pdf
    • https://cdn.shopify.com/s/files/1/0449/5494/3647/files/pisigufejupokevuzeletodom.pdf
    • https://cdn.shopify.com/s/files/1/0432/4127/5547/files/how_to_conduct_research_project.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/44929456585.pdf
    • https://cdn.shopify.com/s/files/1/0434/5053/1990/files/rujusasijujazubarogifuzoz.pdf
    • https://cdn.shopify.com/s/files/1/0436/7004/4825/files/perfect_health_diet_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/2764/5084/files/9955738505.pdf
    • https://cdn.shopify.com/s/files/1/0432/5700/4192/files/delisedonakexi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0870/4164/files/brche_regeln.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/17418425376.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/
    • https://cdn.shopify.com/s/files/1/0432/7673/0533

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007986.bin
9c30618ba77f99d00b3a66d466c7954890724c8e45e6bf9eb828cad2038563c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7986 5380 bytes
font_01_sfnt_off00008bbb.bin
e64553c49f13ba4fd300cf59bed18d0ea7ec212bca582bd66422f6b1ccc75ced
pdf-font-stream PDF embedded font (sfnt) at offset 0x8BBB 11540 bytes