Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6996579b94bce7e…

MALICIOUS

PDF

50.6 KB Created: 2020-07-29 20:50:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 200e8d3894ea0d7511b8ead6b0d4b14d SHA-1: 439dcde80913be100e9d976d4a002bb6c85513f9 SHA-256: e6996579b94bce7edc43002ca345ed13c4cc846b911cceb93f032ecb9b989d08
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. This URL is embedded within the document and is designed to lure the user to a malicious destination. The PDF also features a link farm, suggesting an attempt to manipulate search engine results or distribute content widely. The ML classifier strongly indicates 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=federal+supreme+court+cassation+decision+volume+19+pdf
    • http://files.gmskinner.com/uploads/1/3/0/9/130968935/turimosafo.pdf
    • http://files.banerjeesharmistha.com/uploads/1/3/2/7/132710632/c3d8ce5f8.pdf
    • http://files.videointeractionproject.org/uploads/1/3/1/3/131382092/15690596f2de4.pdf
    • http://files.b-kool.com/uploads/1/3/0/7/130775978/kadex-gamabobapes.pdf
    • https://cdn.shopify.com/s/files/1/0434/2782/3765/files/93178463062.pdf
    • https://cdn.shopify.com/s/files/1/0430/2854/5693/files/fisoronosibiruwapot.pdf
    • https://cdn.shopify.com/s/files/1/0432/5251/4971/files/didiposixetonevawikeb.pdf
    • https://cdn.shopify.com/s/files/1/0429/0645/2127/files/26583917181.pdf
    • https://cdn.shopify.com/s/files/1/0435/7832/7199/files/kitumededix.pdf
    • https://cdn.shopify.com/s/files/1/0431/6551/5933/files/86167292194.pdf
    • https://cdn.shopify.com/s/files/1/0434/3706/4344/files/jereluwuvokuwu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2737/2964/files/sosonulisuxukenig.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71061356311.pdf
    • https://cdn.shopify.com/s/files/1/0440/0257/4494/files/jujulisesasogezupufugetip.pdf
    • https://cdn.shopify.com/s/files/1/0431/9926/6979/files/67216659876.pdf
    • https://cdn.shopify.com/s/files/1/0427/5005/0460/files/16218423584.pdf
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/worerapuzur.pdf
    • https://cdn.shopify.com/s/files/1/0432/9065/6936/files/23131934554.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_off00008377.bin
00b87025de6600b82a6d67964d8391c7eb815f37a19a8d6240d0f183b66d4f05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8377 5404 bytes
font_01_sfnt_off000095ca.bin
d098bbde627d27e6819766dd3446c05e07f7c6e0c3fad674a2eac20aa62f9771		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95CA 12112 bytes

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