Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc65380070992d3a…

MALICIOUS

PDF

48.7 KB Created: 2020-08-12 15:57:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d46e293bdd032ab71c203bd0d1ccb29d SHA-1: c50f4b37cda6fb7f3f72c2f55cb35296cdfd7f6a SHA-256: dc65380070992d3a5bc245bd93d0049cfca0008321a929419543a131de303651
152 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK. The primary malicious URL identified is https://ttraff.cc/pify?keyword=joint+pdf+probability+examples, which is likely used to redirect the user to further malicious content. The document body, though heavily obfuscated, contains this URL, suggesting it's part of the lure. The ML classifier also strongly flagged this PDF as malicious.

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=joint+pdf+probability+examples
    • http://files.joyenomoto.com/uploads/1/3/0/7/130739076/0693709aa.pdf
    • http://files.rbawebdesign.com/uploads/1/3/0/7/130740213/kojobesawetesog.pdf
    • http://pavez.emilysarahmatthews.com/uploads/1/3/1/8/131871721/rozalokugodowig_wajomul_sopipitekikeme.pdf
    • http://pavez.emilysarahmatthews.com/uploads/1/3/1
    • https://cdn.shopify.com/s/files/1/0431/3032/3095/files/sigevo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4106/2040/files/types_of_addressing_modes_with_examples.pdf
    • https://cdn.shopify.com/s/files/1/0435/4483/8303/files/rojoden.pdf
    • https://cdn.shopify.com/s/files/1/0431/3654/9018/files/rabinavebesigavimiw.pdf
    • https://cdn.shopify.com/s/files/1/0430/7540/3936/files/20482322635.pdf
    • https://cdn.shopify.com/s/files/1/0430/8582/4164/files/jupivusekaletak.pdf
    • https://cdn.shopify.com/s/files/1/0436/9815/9769/files/24512616374.pdf
    • https://cdn.shopify.com/s/files/1/0440/0657/2197/files/activity_ratios.pdf
    • https://cdn.shopify.com/s/files/1/0432/9901/2763/files/tazifodazosiseliwuma.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kewosa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/69774521372.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067a2.bin
87d628caed3d1e103d1209d50a969595f623970cb280adba8895a25d300db174		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67A2 5484 bytes
font_01_sfnt_off00007a39.bin
81823aa93df0b3546316e203d686bc7f781f8ce7d2e80a61144ca5e2266fadb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A39 11156 bytes
font_02_sfnt_off0000a010.bin
d2e8f35aa05d0d02945a1b1bdc5933ca749d080bce15cea5d2eb2ee77cfae92e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA010 16144 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.